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Question 320
A client cannot join one particular WLAN. The engineer needs GUI evidence of association, policy, security and rejection state, rather than relying on DHCP logs alone. Which client/WLAN operational view should be inspected?
- Read only the VLAN interface subnet mask and ignore association status
- Inspect only PoE budget while the AP is already joined and serving other SSIDs
- Inspect WLAN client association and security state in the GUI
- Change the SSID name before inspecting the client failure reason
Explanation
Correct Answer
C:Per-client status and failure events separate association, authentication and IP issues.
Incorrect Answers
A:A VLAN mask cannot show whether the WLAN rejected the client in authentication or association.
B:Power evidence may establish AP uptime, but not the particular client security/policy rejection on this WLAN.
D:Changing the WLAN identity is disruptive and does not provide the requested read-only GUI evidence for association/security troubleshooting.
Question 321
A Cisco IOS route table includes `C 10.12.20.0/24 is directly connected, GigabitEthernet0/1`. What does the leading C tell the operator about the installed route source?
- The prefix was added with a manual ip route static configuration
- Recognize the C route code
- The route was calculated by OSPF from neighbor link-state information
- The route is only the gateway of last resort 0.0.0.0/0
Explanation
Correct Answer
B:The C code identifies a connected route installed because a configured Layer 3 interface in that prefix is up; it is not sourced from a static route statement or OSPF.
Incorrect Answers
A:Static routes use the S source code; the displayed C route is learned from an operationally connected interface.
C:OSPF routes use the O family of source codes, so this directly connected example is not OSPF learned.
D:A gateway of last resort is an installed default route; the displayed C prefix is the local directly attached /24.
Question 322
An operator sees `S 10.90.0.0/16 [1/0] via 192.0.2.1` in `show ip route`. Which IOS source-code interpretation is supported by the leading S?
- C means the prefix is connected directly to a local up interface
- O means the prefix was learned using OSPF
- R means the prefix was learned through RIP
- Recognize the S route code
Explanation
Correct Answer
D:The S code means an administrator configured the static route or equivalent static route source; the default administrative distance of 1 is consistent with an ordinary static route.
Incorrect Answers
A:Connected routes use C and have a directly attached interface; the S indicates a static administrative route.
B:The displayed source code is not O; OSPF also normally has AD 110, distinct from this configured static entry.
C:RIP uses R with a default administrative distance of 120, not the S code shown for a static route.
Question 323
A router displays `O 10.33.44.0/24 [110/30] via 192.0.2.2` under `show ip route`. Which route-source meaning of its leading O is correct?
- The O identifies a directly connected Layer 3 interface network
- The O identifies a manually configured static route
- Recognize the O route code
- The O represents an RIPv2 route advertised by a distance-vector peer
Explanation
Correct Answer
C:The O code identifies an OSPF route and [110/30] displays its administrative distance and OSPF metric, not the route age or prefix length.
Incorrect Answers
A:Connected routes use C; an OSPF-learned route can point via a neighboring router instead.
B:Static routes use S and a default administrative distance of 1, whereas the example shows OSPF with default AD 110.
D:RIP uses R, not O, and has a different default administrative distance; the displayed code identifies OSPF.
Question 324
An IOS `show ip route` line reads `O 10.40.0.0/16 [110/25] via 192.0.2.2, GigabitEthernet0/1`. The engineer needs the IP of the immediate adjacent router, not the route's destination network. Which field identifies it?
- The destination prefix 10.40.0.0/16 shown after the O code
- The administrative distance 110 inside the route brackets
- The local outgoing interface GigabitEthernet0/1
- Identify the route next-hop address following via
Explanation
Correct Answer
D:The via keyword introduces the next-hop IP 192.0.2.2, the directly adjacent router to which the device sends matching packets.
Incorrect Answers
A:The destination prefix identifies the remote network whose traffic matches the route, not the address of the adjacent forwarding router.
B:Administrative distance 110 ranks the route source at RIB selection; it is not an IP address for the adjacent next hop.
C:The outgoing interface names the local router port used to transmit, not the adjacent router IP address itself.
Question 325
A router has several specific IPv4 routes and one installed `S* 0.0.0.0/0` route. Which displayed RIB information identifies where packets with no more-specific match are forwarded?
- The O code for an OSPF-learned destination, regardless of whether its prefix matches
- An unrelated connected subnet route used only for traffic destined within that subnet
- A route to another specific prefix that does not contain the packet destination
- Read the gateway of last resort or installed 0.0.0.0/0 route
Explanation
Correct Answer
D:The installed 0.0.0.0/0 default route (gateway of last resort) matches any destination and supplies the fallback when no longer prefix matches.
Incorrect Answers
A:A route code only indicates its source; an unrelated OSPF route cannot send traffic to a destination outside its prefix.
B:Connected subnets represent directly attached networks; they do not replace the least-specific installed default for arbitrary unmatched remote destinations.
C:A specific route is selected only when it matches the packet destination; the described packet has no such more-specific match.
Question 326
An IOS route line is `O 10.4.0.0/16 [110/20] via 192.0.2.2`. The auditor asks what the **first** bracketed number means, independently of the OSPF path cost. Which field is 110?
- The destination prefix length in bits
- The OSPF path metric for this route
- The elapsed route age in seconds
- Read administrative distance 110
Explanation
Correct Answer
D:The Cisco route-table [AD/metric] notation puts the administrative distance first; 110 is the default AD assigned to OSPF and is evaluated when choosing among route sources for the same prefix.
Incorrect Answers
A:The prefix is /16, shown in the destination network, not in the first position inside [110/20].
B:The OSPF metric is the second bracket value, 20; the first position is administrative distance.
C:IOS normally reports route age after the next-hop or preceding the interface, separate from the [AD/metric] pair.
Question 327
For `O 10.4.0.0/16 [110/20] via 192.0.2.2`, a technician must identify the **second** number in the brackets for OSPF path comparison. What is that value?
- Administrative distance 110, used to compare competing routing sources
- Prefix length 16, representing the destination mask
- Next hop 192.0.2.2, identifying the adjacent router
- Read the OSPF metric 20
Explanation
Correct Answer
D:In the route-table display the second bracketed value is the routing protocol metric. Here OSPF cost 20 is separate from OSPF’s administrative distance 110.
Incorrect Answers
A:Administrative distance occupies the first bracketed position, while the second is the routing protocol metric.
B:The /16 prefix length is shown after the destination address, separate from the pair [110/20].
C:The next-hop address follows the via keyword; the second bracketed value is not an IP address.
Question 328
The routing table contains `10.55.2.0/24` and a technician must interpret the number following the slash. How many high-order address bits belong to the network prefix?
- 110 address bits, inferred from the OSPF administrative distance
- 20 address bits, inferred from the OSPF path metric
- Treat 24 bits as the prefix length
- 32 address bits, confusing a /24 subnet with a /32 host route
Explanation
Correct Answer
C:CIDR /24 indicates the first 24 high-order bits are the destination network prefix, equivalent to subnet mask 255.255.255.0.
Incorrect Answers
A:110 is the OSPF administrative distance in a typical IOS route display; an IPv4 address has only 32 bits, so that number is not a mask length.
B:OSPF cost is a route metric unrelated to the number of high-order address bits retained in the destination prefix.
D:A /32 would match a single IPv4 host address; the displayed /24 leaves eight host-address bits variable.
Question 329
A route for 10.20.0.0/16 lists `via 192.0.2.2, GigabitEthernet0/1`. The question asks the **local transmit port**, not the next-router IP. Which route-entry field provides that interface?
- Read 192.0.2.2 as the local egress interface name
- Read 10.20.0.0/16 as the physical egress interface
- Read the outgoing interface in the route entry
- Read the route source code and infer the outgoing physical port
Explanation
Correct Answer
C:The route may name the interface through which packets leave the router.
Incorrect Answers
A:The via address is the next-hop IPv4 address, not the local GigabitEthernet interface.
B:The prefix is the destination network matched by routing, not the port used to send the packet.
D:A route source code tells how the route was learned, not the explicit GigabitEthernet0/1 egress reported in the entry.
Question 330
A router displays `S* 0.0.0.0/0 [1/0] via 192.0.2.1` in `show ip route`. What does the `S*` route-code prefix convey?
- It is a static route that is a candidate default route
- It is an OSPF-learned local interface host route
- It is a directly connected network with a /32 host prefix
- It is a RIP route that can only be used after an OSPF failure
Explanation
Correct Answer
A:S denotes static; the asterisk marks a candidate default route. The /0 destination confirms this is the fallback prefix.
Incorrect Answers
B:OSPF entries use O-related codes, and local interface host routes use L; neither is represented by S*.
C:Connected prefixes use C and local host addresses use L, not a static candidate-default code.
D:RIP routes use R and the asterisk does not imply a dynamic protocol failover policy.
Cisco Certified Network Associate (CCNA) (200-301) Practice Tests