CompTIA Network+ N10-009 Ports Protocols Services And Traffic Types Practice Test

 

Objective 1.4 • 20 original questions

This CompTIA Network+ N10-009 practice test focuses on ports, protocols, services, and traffic types. All questions are original ExamSnap scenarios aligned to the current N10-009 blueprint; they are not copied from CompTIA exam content. Use the complete N10-009 collection for broader practice across all five domains. For broader exam preparation, review the CompTIA Network+ N10-009 Exam Dumps page.

Instructions: Select the best answer for each question. Review the explanation after answering; each distractor includes a reason it is not the best choice for that scenario.

Question 1

At Litware Manufacturing, a systems administrator is reviewing a network change. The requirement is to identify the traditional ports used by unencrypted FTP. Which option is the best fit? The decision applies to a branch-office rollout.

1. SIP 5060/5061
2. HTTP 80
3. DNS 53
4. IPsec AH
5. FTP 20/21

Correct answer: E

Why: FTP uses TCP 21 for control and traditionally TCP 20 for active-mode data. This directly satisfies the requirement: identify the traditional ports used by unencrypted FTP.

Option review:

A: SIP commonly uses 5060 without TLS and 5061 with TLS. However, it does not most directly satisfy the requirement in this scenario: identify the traditional ports used by unencrypted FTP.

B: HTTP commonly uses TCP 80 for unencrypted web traffic. However, it does not most directly satisfy the requirement in this scenario: identify the traditional ports used by unencrypted FTP.

C: DNS commonly uses UDP 53 for queries and TCP 53 for larger transfers or zone operations. However, it does not most directly satisfy the requirement in this scenario: identify the traditional ports used by unencrypted FTP.

D: AH provides integrity/authentication for IP packets but does not encrypt payload contents. However, it does not most directly satisfy the requirement in this scenario: identify the traditional ports used by unencrypted FTP.

E: FTP uses TCP 21 for control and traditionally TCP 20 for active-mode data. This directly satisfies the requirement: identify the traditional ports used by unencrypted FTP.

Learning point: Use FTP 20/21 when the key requirement is to identify the traditional ports used by unencrypted FTP.

Question 2

A ticket at Woodgrove Bank says the team must identify the port used by SSH-based secure administration or SFTP. Which technology or concept most directly addresses this requirement? The decision applies to a campus refresh.

1. SIP 5060/5061
2. FTP 20/21
3. SMTPS 587
4. Anycast
5. SFTP/SSH 22

Correct answer: E

Why: SSH and SFTP use TCP 22 for secure remote shell and file transfer. This directly satisfies the requirement: identify the port used by SSH-based secure administration or SFTP.

Option review:

A: SIP commonly uses 5060 without TLS and 5061 with TLS. However, it does not most directly satisfy the requirement in this scenario: identify the port used by SSH-based secure administration or SFTP.

B: FTP uses TCP 21 for control and traditionally TCP 20 for active-mode data. However, it does not most directly satisfy the requirement in this scenario: identify the port used by SSH-based secure administration or SFTP.

C: TCP 587 is commonly used for authenticated mail submission with TLS support. However, it does not most directly satisfy the requirement in this scenario: identify the port used by SSH-based secure administration or SFTP.

D: Anycast routes a shared address to the nearest or best instance according to routing. However, it does not most directly satisfy the requirement in this scenario: identify the port used by SSH-based secure administration or SFTP.

E: SSH and SFTP use TCP 22 for secure remote shell and file transfer. This directly satisfies the requirement: identify the port used by SSH-based secure administration or SFTP.

Learning point: Use SFTP/SSH 22 when the key requirement is to identify the port used by SSH-based secure administration or SFTP.

Question 3

During a design meeting at Blue Yonder Airlines, the junior network administrator needs to identify the legacy unencrypted remote terminal service. What should be selected? The decision applies to a data-center segment.

1. RDP 3389
2. Telnet 23
3. GRE
4. Unicast
5. UDP

Correct answer: B

Why: Telnet uses TCP 23 and provides unencrypted terminal access. This directly satisfies the requirement: identify the legacy unencrypted remote terminal service.

Option review:

A: Remote Desktop Protocol commonly uses TCP/UDP 3389. However, it does not most directly satisfy the requirement in this scenario: identify the legacy unencrypted remote terminal service.

B: Telnet uses TCP 23 and provides unencrypted terminal access. This directly satisfies the requirement: identify the legacy unencrypted remote terminal service.

C: GRE encapsulates Layer 3 protocols inside IP but does not provide encryption by itself. However, it does not most directly satisfy the requirement in this scenario: identify the legacy unencrypted remote terminal service.

D: Unicast sends traffic from one source to one specific destination. However, it does not most directly satisfy the requirement in this scenario: identify the legacy unencrypted remote terminal service.

E: UDP is connectionless and low-overhead, without built-in delivery guarantees. However, it does not most directly satisfy the requirement in this scenario: identify the legacy unencrypted remote terminal service.

Learning point: Use Telnet 23 when the key requirement is to identify the legacy unencrypted remote terminal service.

Question 4

Contoso Health is updating its network standard. Which option best meets the need to identify the traditional server-to-server email transfer port? The decision applies to a remote-site migration.

1. SMTP 25
2. TCP
3. LDAP 389
4. Telnet 23
5. HTTPS 443

Correct answer: A

Why: SMTP commonly uses TCP 25 for server-to-server mail transfer. This directly satisfies the requirement: identify the traditional server-to-server email transfer port.

Option review:

A: SMTP commonly uses TCP 25 for server-to-server mail transfer. This directly satisfies the requirement: identify the traditional server-to-server email transfer port.

B: TCP is connection-oriented and provides ordered, reliable byte delivery. However, it does not most directly satisfy the requirement in this scenario: identify the traditional server-to-server email transfer port.

C: LDAP commonly uses TCP/UDP 389 for directory access without LDAPS. However, it does not most directly satisfy the requirement in this scenario: identify the traditional server-to-server email transfer port.

D: Telnet uses TCP 23 and provides unencrypted terminal access. However, it does not most directly satisfy the requirement in this scenario: identify the traditional server-to-server email transfer port.

E: HTTPS uses TCP 443 for TLS-protected web traffic. However, it does not most directly satisfy the requirement in this scenario: identify the traditional server-to-server email transfer port.

Learning point: Use SMTP 25 when the key requirement is to identify the traditional server-to-server email transfer port.

Question 5

A field technician at Litware Manufacturing is validating a proposed solution. The design must identify the standard port for DNS queries and related traffic. Which answer is most appropriate? The decision applies to a operations lab.

1. SMTP 25
2. GRE
3. SNMP 161/162
4. DNS 53
5. Unicast

Correct answer: D

Why: DNS commonly uses UDP 53 for queries and TCP 53 for larger transfers or zone operations. This directly satisfies the requirement: identify the standard port for DNS queries and related traffic.

Option review:

A: SMTP commonly uses TCP 25 for server-to-server mail transfer. However, it does not most directly satisfy the requirement in this scenario: identify the standard port for DNS queries and related traffic.

B: GRE encapsulates Layer 3 protocols inside IP but does not provide encryption by itself. However, it does not most directly satisfy the requirement in this scenario: identify the standard port for DNS queries and related traffic.

C: SNMP typically uses UDP 161 for queries and 162 for traps/informs. However, it does not most directly satisfy the requirement in this scenario: identify the standard port for DNS queries and related traffic.

D: DNS commonly uses UDP 53 for queries and TCP 53 for larger transfers or zone operations. This directly satisfies the requirement: identify the standard port for DNS queries and related traffic.

E: Unicast sends traffic from one source to one specific destination. However, it does not most directly satisfy the requirement in this scenario: identify the standard port for DNS queries and related traffic.

Learning point: Use DNS 53 when the key requirement is to identify the standard port for DNS queries and related traffic.

Question 6

For a new deployment at Woodgrove Bank, the networking team wants to identify the UDP port pair used for IPv4 address leasing. Which choice most directly satisfies the goal? The decision applies to a production maintenance window.

1. SMTP 25
2. SFTP/SSH 22
3. HTTPS 443
4. NTP 123
5. DHCP 67/68

Correct answer: E

Why: DHCP uses UDP 67 on servers and UDP 68 on clients. This directly satisfies the requirement: identify the UDP port pair used for IPv4 address leasing.

Option review:

A: SMTP commonly uses TCP 25 for server-to-server mail transfer. However, it does not most directly satisfy the requirement in this scenario: identify the UDP port pair used for IPv4 address leasing.

B: SSH and SFTP use TCP 22 for secure remote shell and file transfer. However, it does not most directly satisfy the requirement in this scenario: identify the UDP port pair used for IPv4 address leasing.

C: HTTPS uses TCP 443 for TLS-protected web traffic. However, it does not most directly satisfy the requirement in this scenario: identify the UDP port pair used for IPv4 address leasing.

D: NTP uses UDP 123 for network time synchronization. However, it does not most directly satisfy the requirement in this scenario: identify the UDP port pair used for IPv4 address leasing.

E: DHCP uses UDP 67 on servers and UDP 68 on clients. This directly satisfies the requirement: identify the UDP port pair used for IPv4 address leasing.

Learning point: Use DHCP 67/68 when the key requirement is to identify the UDP port pair used for IPv4 address leasing.

Question 7

At Blue Yonder Airlines, a systems administrator is reviewing a network change. The requirement is to identify the simple UDP file-transfer service often used by network devices. Which option is the best fit? The decision applies to a new floor deployment.

1. GRE
2. TFTP 69
3. SMB 445
4. UDP
5. Telnet 23

Correct answer: B

Why: TFTP uses UDP 69 for simple unauthenticated file transfer. This directly satisfies the requirement: identify the simple UDP file-transfer service often used by network devices.

Option review:

A: GRE encapsulates Layer 3 protocols inside IP but does not provide encryption by itself. However, it does not most directly satisfy the requirement in this scenario: identify the simple UDP file-transfer service often used by network devices.

B: TFTP uses UDP 69 for simple unauthenticated file transfer. This directly satisfies the requirement: identify the simple UDP file-transfer service often used by network devices.

C: Modern SMB commonly uses TCP 445 for Windows file and printer sharing. However, it does not most directly satisfy the requirement in this scenario: identify the simple UDP file-transfer service often used by network devices.

D: UDP is connectionless and low-overhead, without built-in delivery guarantees. However, it does not most directly satisfy the requirement in this scenario: identify the simple UDP file-transfer service often used by network devices.

E: Telnet uses TCP 23 and provides unencrypted terminal access. However, it does not most directly satisfy the requirement in this scenario: identify the simple UDP file-transfer service often used by network devices.

Learning point: Use TFTP 69 when the key requirement is to identify the simple UDP file-transfer service often used by network devices.

Question 8

A ticket at Contoso Health says the team must identify the standard unencrypted web service port. Which technology or concept most directly addresses this requirement? The decision applies to a service-recovery review.

1. Syslog 514
2. LDAP 389
3. SFTP/SSH 22
4. TCP
5. HTTP 80

Correct answer: E

Why: HTTP commonly uses TCP 80 for unencrypted web traffic. This directly satisfies the requirement: identify the standard unencrypted web service port.

Option review:

A: Traditional syslog commonly uses UDP 514. However, it does not most directly satisfy the requirement in this scenario: identify the standard unencrypted web service port.

B: LDAP commonly uses TCP/UDP 389 for directory access without LDAPS. However, it does not most directly satisfy the requirement in this scenario: identify the standard unencrypted web service port.

C: SSH and SFTP use TCP 22 for secure remote shell and file transfer. However, it does not most directly satisfy the requirement in this scenario: identify the standard unencrypted web service port.

D: TCP is connection-oriented and provides ordered, reliable byte delivery. However, it does not most directly satisfy the requirement in this scenario: identify the standard unencrypted web service port.

E: HTTP commonly uses TCP 80 for unencrypted web traffic. This directly satisfies the requirement: identify the standard unencrypted web service port.

Learning point: Use HTTP 80 when the key requirement is to identify the standard unencrypted web service port.

Question 9

During a design meeting at Litware Manufacturing, the junior network administrator needs to identify the standard network time synchronization port. What should be selected? The decision applies to a branch-office rollout.

1. Telnet 23
2. ICMP
3. RDP 3389
4. NTP 123
5. Broadcast

Correct answer: D

Why: NTP uses UDP 123 for network time synchronization. This directly satisfies the requirement: identify the standard network time synchronization port.

Option review:

A: Telnet uses TCP 23 and provides unencrypted terminal access. However, it does not most directly satisfy the requirement in this scenario: identify the standard network time synchronization port.

B: ICMP carries network control and diagnostic messages such as echo requests and replies. However, it does not most directly satisfy the requirement in this scenario: identify the standard network time synchronization port.

C: Remote Desktop Protocol commonly uses TCP/UDP 3389. However, it does not most directly satisfy the requirement in this scenario: identify the standard network time synchronization port.

D: NTP uses UDP 123 for network time synchronization. This directly satisfies the requirement: identify the standard network time synchronization port.

E: IPv4 broadcast sends traffic to all hosts in a broadcast domain. However, it does not most directly satisfy the requirement in this scenario: identify the standard network time synchronization port.

Learning point: Use NTP 123 when the key requirement is to identify the standard network time synchronization port.

Question 10

Woodgrove Bank is updating its network standard. Which option best meets the need to identify the management and trap ports associated with SNMP? The decision applies to a campus refresh.

1. RDP 3389
2. SFTP/SSH 22
3. SNMP 161/162
4. Unicast
5. NTP 123

Correct answer: C

Why: SNMP typically uses UDP 161 for queries and 162 for traps/informs. This directly satisfies the requirement: identify the management and trap ports associated with SNMP.

Option review:

A: Remote Desktop Protocol commonly uses TCP/UDP 3389. However, it does not most directly satisfy the requirement in this scenario: identify the management and trap ports associated with SNMP.

B: SSH and SFTP use TCP 22 for secure remote shell and file transfer. However, it does not most directly satisfy the requirement in this scenario: identify the management and trap ports associated with SNMP.

C: SNMP typically uses UDP 161 for queries and 162 for traps/informs. This directly satisfies the requirement: identify the management and trap ports associated with SNMP.

D: Unicast sends traffic from one source to one specific destination. However, it does not most directly satisfy the requirement in this scenario: identify the management and trap ports associated with SNMP.

E: NTP uses UDP 123 for network time synchronization. However, it does not most directly satisfy the requirement in this scenario: identify the management and trap ports associated with SNMP.

Learning point: Use SNMP 161/162 when the key requirement is to identify the management and trap ports associated with SNMP.

Question 11

A field technician at Blue Yonder Airlines is validating a proposed solution. The design must identify the standard LDAP directory-service port. Which answer is most appropriate? The decision applies to a data-center segment.

1. LDAP 389
2. TCP
3. RDP 3389
4. DNS 53
5. NTP 123

Correct answer: A

Why: LDAP commonly uses TCP/UDP 389 for directory access without LDAPS. This directly satisfies the requirement: identify the standard LDAP directory-service port.

Option review:

A: LDAP commonly uses TCP/UDP 389 for directory access without LDAPS. This directly satisfies the requirement: identify the standard LDAP directory-service port.

B: TCP is connection-oriented and provides ordered, reliable byte delivery. However, it does not most directly satisfy the requirement in this scenario: identify the standard LDAP directory-service port.

C: Remote Desktop Protocol commonly uses TCP/UDP 3389. However, it does not most directly satisfy the requirement in this scenario: identify the standard LDAP directory-service port.

D: DNS commonly uses UDP 53 for queries and TCP 53 for larger transfers or zone operations. However, it does not most directly satisfy the requirement in this scenario: identify the standard LDAP directory-service port.

E: NTP uses UDP 123 for network time synchronization. However, it does not most directly satisfy the requirement in this scenario: identify the standard LDAP directory-service port.

Learning point: Use LDAP 389 when the key requirement is to identify the standard LDAP directory-service port.

Question 12

For a new deployment at Contoso Health, the networking team wants to identify the standard TLS-protected web service port. Which choice most directly satisfies the goal? The decision applies to a remote-site migration.

1. FTP 20/21
2. Broadcast
3. HTTPS 443
4. Syslog 514
5. LDAP 389

Correct answer: C

Why: HTTPS uses TCP 443 for TLS-protected web traffic. This directly satisfies the requirement: identify the standard TLS-protected web service port.

Option review:

A: FTP uses TCP 21 for control and traditionally TCP 20 for active-mode data. However, it does not most directly satisfy the requirement in this scenario: identify the standard TLS-protected web service port.

B: IPv4 broadcast sends traffic to all hosts in a broadcast domain. However, it does not most directly satisfy the requirement in this scenario: identify the standard TLS-protected web service port.

C: HTTPS uses TCP 443 for TLS-protected web traffic. This directly satisfies the requirement: identify the standard TLS-protected web service port.

D: Traditional syslog commonly uses UDP 514. However, it does not most directly satisfy the requirement in this scenario: identify the standard TLS-protected web service port.

E: LDAP commonly uses TCP/UDP 389 for directory access without LDAPS. However, it does not most directly satisfy the requirement in this scenario: identify the standard TLS-protected web service port.

Learning point: Use HTTPS 443 when the key requirement is to identify the standard TLS-protected web service port.

Question 13

At Litware Manufacturing, a systems administrator is reviewing a network change. The requirement is to identify the port used by direct-hosted SMB file sharing. Which option is the best fit? The decision applies to a operations lab.

1. SMB 445
2. TCP
3. IPsec AH
4. DNS 53
5. Anycast

Correct answer: A

Why: Modern SMB commonly uses TCP 445 for Windows file and printer sharing. This directly satisfies the requirement: identify the port used by direct-hosted SMB file sharing.

Option review:

A: Modern SMB commonly uses TCP 445 for Windows file and printer sharing. This directly satisfies the requirement: identify the port used by direct-hosted SMB file sharing.

B: TCP is connection-oriented and provides ordered, reliable byte delivery. However, it does not most directly satisfy the requirement in this scenario: identify the port used by direct-hosted SMB file sharing.

C: AH provides integrity/authentication for IP packets but does not encrypt payload contents. However, it does not most directly satisfy the requirement in this scenario: identify the port used by direct-hosted SMB file sharing.

D: DNS commonly uses UDP 53 for queries and TCP 53 for larger transfers or zone operations. However, it does not most directly satisfy the requirement in this scenario: identify the port used by direct-hosted SMB file sharing.

E: Anycast routes a shared address to the nearest or best instance according to routing. However, it does not most directly satisfy the requirement in this scenario: identify the port used by direct-hosted SMB file sharing.

Learning point: Use SMB 445 when the key requirement is to identify the port used by direct-hosted SMB file sharing.

Question 14

A ticket at Woodgrove Bank says the team must identify the traditional port used to send syslog messages. Which technology or concept most directly addresses this requirement? The decision applies to a production maintenance window.

1. NTP 123
2. Syslog 514
3. UDP
4. SMTPS 587
5. SMTP 25

Correct answer: B

Why: Traditional syslog commonly uses UDP 514. This directly satisfies the requirement: identify the traditional port used to send syslog messages.

Option review:

A: NTP uses UDP 123 for network time synchronization. However, it does not most directly satisfy the requirement in this scenario: identify the traditional port used to send syslog messages.

B: Traditional syslog commonly uses UDP 514. This directly satisfies the requirement: identify the traditional port used to send syslog messages.

C: UDP is connectionless and low-overhead, without built-in delivery guarantees. However, it does not most directly satisfy the requirement in this scenario: identify the traditional port used to send syslog messages.

D: TCP 587 is commonly used for authenticated mail submission with TLS support. However, it does not most directly satisfy the requirement in this scenario: identify the traditional port used to send syslog messages.

E: SMTP commonly uses TCP 25 for server-to-server mail transfer. However, it does not most directly satisfy the requirement in this scenario: identify the traditional port used to send syslog messages.

Learning point: Use Syslog 514 when the key requirement is to identify the traditional port used to send syslog messages.

Question 15

During a design meeting at Blue Yonder Airlines, the junior network administrator needs to identify the modern email submission port listed in the N10-009 objectives. What should be selected? The decision applies to a new floor deployment.

1. ICMP
2. IKE
3. SMB 445
4. SFTP/SSH 22
5. SMTPS 587

Correct answer: E

Why: TCP 587 is commonly used for authenticated mail submission with TLS support. This directly satisfies the requirement: identify the modern email submission port listed in the N10-009 objectives.

Option review:

A: ICMP carries network control and diagnostic messages such as echo requests and replies. However, it does not most directly satisfy the requirement in this scenario: identify the modern email submission port listed in the N10-009 objectives.

B: IKE negotiates IPsec security associations and keying material. However, it does not most directly satisfy the requirement in this scenario: identify the modern email submission port listed in the N10-009 objectives.

C: Modern SMB commonly uses TCP 445 for Windows file and printer sharing. However, it does not most directly satisfy the requirement in this scenario: identify the modern email submission port listed in the N10-009 objectives.

D: SSH and SFTP use TCP 22 for secure remote shell and file transfer. However, it does not most directly satisfy the requirement in this scenario: identify the modern email submission port listed in the N10-009 objectives.

E: TCP 587 is commonly used for authenticated mail submission with TLS support. This directly satisfies the requirement: identify the modern email submission port listed in the N10-009 objectives.

Learning point: Use SMTPS 587 when the key requirement is to identify the modern email submission port listed in the N10-009 objectives.

Question 16

Contoso Health is updating its network standard. Which option best meets the need to identify the TLS-protected directory-service port? The decision applies to a service-recovery review.

1. TCP
2. SQL Server 1433
3. LDAPS 636
4. RDP 3389
5. IPsec AH

Correct answer: C

Why: LDAPS commonly uses TCP 636 for LDAP protected by TLS. This directly satisfies the requirement: identify the TLS-protected directory-service port.

Option review:

A: TCP is connection-oriented and provides ordered, reliable byte delivery. However, it does not most directly satisfy the requirement in this scenario: identify the TLS-protected directory-service port.

B: Microsoft SQL Server commonly listens on TCP 1433. However, it does not most directly satisfy the requirement in this scenario: identify the TLS-protected directory-service port.

C: LDAPS commonly uses TCP 636 for LDAP protected by TLS. This directly satisfies the requirement: identify the TLS-protected directory-service port.

D: Remote Desktop Protocol commonly uses TCP/UDP 3389. However, it does not most directly satisfy the requirement in this scenario: identify the TLS-protected directory-service port.

E: AH provides integrity/authentication for IP packets but does not encrypt payload contents. However, it does not most directly satisfy the requirement in this scenario: identify the TLS-protected directory-service port.

Learning point: Use LDAPS 636 when the key requirement is to identify the TLS-protected directory-service port.

Question 17

A field technician at Litware Manufacturing is validating a proposed solution. The design must identify the default Microsoft SQL Server database port. Which answer is most appropriate? The decision applies to a branch-office rollout.

1. Telnet 23
2. HTTPS 443
3. Syslog 514
4. ICMP
5. SQL Server 1433

Correct answer: E

Why: Microsoft SQL Server commonly listens on TCP 1433. This directly satisfies the requirement: identify the default Microsoft SQL Server database port.

Option review:

A: Telnet uses TCP 23 and provides unencrypted terminal access. However, it does not most directly satisfy the requirement in this scenario: identify the default Microsoft SQL Server database port.

B: HTTPS uses TCP 443 for TLS-protected web traffic. However, it does not most directly satisfy the requirement in this scenario: identify the default Microsoft SQL Server database port.

C: Traditional syslog commonly uses UDP 514. However, it does not most directly satisfy the requirement in this scenario: identify the default Microsoft SQL Server database port.

D: ICMP carries network control and diagnostic messages such as echo requests and replies. However, it does not most directly satisfy the requirement in this scenario: identify the default Microsoft SQL Server database port.

E: Microsoft SQL Server commonly listens on TCP 1433. This directly satisfies the requirement: identify the default Microsoft SQL Server database port.

Learning point: Use SQL Server 1433 when the key requirement is to identify the default Microsoft SQL Server database port.

Question 18

For a new deployment at Woodgrove Bank, the networking team wants to identify the standard Microsoft Remote Desktop port. Which choice most directly satisfies the goal? The decision applies to a campus refresh.

1. LDAPS 636
2. Syslog 514
3. RDP 3389
4. FTP 20/21
5. SNMP 161/162

Correct answer: C

Why: Remote Desktop Protocol commonly uses TCP/UDP 3389. This directly satisfies the requirement: identify the standard Microsoft Remote Desktop port.

Option review:

A: LDAPS commonly uses TCP 636 for LDAP protected by TLS. However, it does not most directly satisfy the requirement in this scenario: identify the standard Microsoft Remote Desktop port.

B: Traditional syslog commonly uses UDP 514. However, it does not most directly satisfy the requirement in this scenario: identify the standard Microsoft Remote Desktop port.

C: Remote Desktop Protocol commonly uses TCP/UDP 3389. This directly satisfies the requirement: identify the standard Microsoft Remote Desktop port.

D: FTP uses TCP 21 for control and traditionally TCP 20 for active-mode data. However, it does not most directly satisfy the requirement in this scenario: identify the standard Microsoft Remote Desktop port.

E: SNMP typically uses UDP 161 for queries and 162 for traps/informs. However, it does not most directly satisfy the requirement in this scenario: identify the standard Microsoft Remote Desktop port.

Learning point: Use RDP 3389 when the key requirement is to identify the standard Microsoft Remote Desktop port.

Question 19

At Blue Yonder Airlines, a systems administrator is reviewing a network change. The requirement is to identify the signaling ports used by SIP. Which option is the best fit? The decision applies to a data-center segment.

1. SIP 5060/5061
2. FTP 20/21
3. RDP 3389
4. Syslog 514
5. DHCP 67/68

Correct answer: A

Why: SIP commonly uses 5060 without TLS and 5061 with TLS. This directly satisfies the requirement: identify the signaling ports used by SIP.

Option review:

A: SIP commonly uses 5060 without TLS and 5061 with TLS. This directly satisfies the requirement: identify the signaling ports used by SIP.

B: FTP uses TCP 21 for control and traditionally TCP 20 for active-mode data. However, it does not most directly satisfy the requirement in this scenario: identify the signaling ports used by SIP.

C: Remote Desktop Protocol commonly uses TCP/UDP 3389. However, it does not most directly satisfy the requirement in this scenario: identify the signaling ports used by SIP.

D: Traditional syslog commonly uses UDP 514. However, it does not most directly satisfy the requirement in this scenario: identify the signaling ports used by SIP.

E: DHCP uses UDP 67 on servers and UDP 68 on clients. However, it does not most directly satisfy the requirement in this scenario: identify the signaling ports used by SIP.

Learning point: Use SIP 5060/5061 when the key requirement is to identify the signaling ports used by SIP.

Question 20

A ticket at Contoso Health says the team must send diagnostic/control messages rather than application data. Which technology or concept most directly addresses this requirement? The decision applies to a remote-site migration.

1. Unicast
2. RDP 3389
3. Syslog 514
4. SNMP 161/162
5. ICMP

Correct answer: E

Why: ICMP carries network control and diagnostic messages such as echo requests and replies. This directly satisfies the requirement: send diagnostic/control messages rather than application data.

Option review:

A: Unicast sends traffic from one source to one specific destination. However, it does not most directly satisfy the requirement in this scenario: send diagnostic/control messages rather than application data.

B: Remote Desktop Protocol commonly uses TCP/UDP 3389. However, it does not most directly satisfy the requirement in this scenario: send diagnostic/control messages rather than application data.

C: Traditional syslog commonly uses UDP 514. However, it does not most directly satisfy the requirement in this scenario: send diagnostic/control messages rather than application data.

D: SNMP typically uses UDP 161 for queries and 162 for traps/informs. However, it does not most directly satisfy the requirement in this scenario: send diagnostic/control messages rather than application data.

E: ICMP carries network control and diagnostic messages such as echo requests and replies. This directly satisfies the requirement: send diagnostic/control messages rather than application data.

Learning point: Use ICMP when the key requirement is to send diagnostic/control messages rather than application data.