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You have configured router R1 with multiple VRF’s in order to support multiple customer VPN networks. If you wanted to see the best path for the 10.1.1.0.24 route in VRF Blue, what command would you use?
Answer: A
Which of the following OSPF Link State Advertisements (LSA’s) were created for IPV6 and do not apply to IPv4 OSPF networks? (Choose two.)
Answer: AD
Router R1 has been configured with a default route like this: R1#(config) ip route 0.0.0.0 0.0.0.0 10.2.3.1 You want to redistribute this route into OSPF but when you configure the redistribute static command under the OSPF process the default route is not present. What will create a default route in the OSPF routing process?
Answer: C
Remember, default-information originate is the command to distribute a default route in OSPF. There are several questions that have this answer.
Source: Adapted from community discussion — bf10690
Which one of the following statements regarding Bidirectional Forwarding Detection (BFD) is correct?
Answer: A
BFD has the following operational modes. In asynchronous mode routers periodically send control packets to activate and maintain BFD sessions. Asynchronous mode is available in two versions: Asynchronous mode without echo Asynchronous mode with echo (default value on Cisco routers)
Source: Adapted from community discussion — TAZZER
Which of the following OSPF neighbor adjacency states is applicable only to manually configured OSPF neighbors in a Non Broadcast Multi-Access network?
Answer: A
https://www.computernetworkingnotes.com/ccna-study-guide/ospf-neighbor-states-explained-with-example.html#:~:text=In%20Non-broadcast%20multi-access%20environment%20such%20as%20Frame%20Relay,it%20does%20not%20have%20to%20discover%20them%20dynamically. Attempt ----------- In Non-broadcast multi-access environment such as Frame Relay and X.25, OSPF uses Attempt state instead of Init state. OSPF uses this state only if neighbors are statically configured with neighbor command. In this situation, it does not have to discover them dynamically. As it already knows the neighbors, it will use unicast instead of multicast in this state. Once neighborship is built, OSPF uses hello packets as keep alive. If a router does not receive a hello packet from any particular neighbor in dead interval, it will change its state to down from full. After changing the state it will make an effort to contact the neighbor by sending Hello packets. This effort is made in Attempt state. Basically Both Init and Attempt states describe similar situation where one router has sent a hello packet and waiting for response.
Source: Adapted from community discussion — SujanSikrikar
With Internal BGP, there is a requirement for all peers to be logically fully meshed, where all IBGP routers must peer with all other IBGP routers. For scaling purposes, there are two mechanisms that were developed to bypass this requirement. What are they? (Choose two.)
Answer: AD
Confederations: Confederations are used to break a large iBGP domain into multiple smaller sub-autonomous systems (ASs), each with its own iBGP full mesh. This reduces the number of iBGP peers in each sub-AS and allows for better scaling of the iBGP network. Route Reflectors: Route Reflectors provide an alternative to the full iBGP mesh requirement by allowing iBGP speakers to form a partial mesh instead of a full mesh. Route Reflectors serve as a central point for iBGP speakers to exchange routing information, and iBGP speakers only need to peer with the Route Reflector instead of forming a full mesh with all iBGP speakers in the network. This reduces the number of iBGP peers and simplifies the iBGP configuration.
Source: Adapted from community discussion — Titini
You have configured policy-based routing on router R1 to force some traffic to go over an alternate link. In order to verify the configuration, which debug command should be used to verify that the specific traffic is taking the intended path?
Answer: C
The "debug ip policy" command is used to display PBR-related information, such as the packets matched by a PBR access-list, and the routing decisions made based on the PBR policy. This command shows whether the traffic is being correctly matched by the PBR policy, and whether it is being forwarded out the correct interface.
Source: Adapted from community discussion — Titini
Which BGP attribute can be used to influence the path that incoming traffic takes into your AS from other Autonomous Systems?
Answer: B
Commenting on my own comment here after looking through this again. The key here is autonomous-systems, plural. MED can influence ingresss if there is a single AS that has multiple ingress points to your AS. Otherwise AS_PATH or advertising a longer-prefix are your options.
Source: Adapted from community discussion — Slinky
Routers R1 and R2 have been configured to use Bidirectional Forwarding Detection? What is the advantage of doing this?
Answer: D
D. BFD is able to discover local link failures at layers 1 and 2 and provides detection for this in less than one second. BFD can detect link failures at both the physical layer (Layer 1) and the data link layer (Layer 2) by sending and receiving packets at a very high rate (often every few milliseconds). If a BFD session detects a link failure, it can immediately signal this to the adjacent node, which can then take appropriate action to reroute traffic or take other measures to restore network connectivity.
Source: Adapted from community discussion — Titini
Which BGP attribute can be used to influence the path that outgoing traffic takes from your AS to other Autonomous Systems? (Choose two.)
Answer: CD
I voted C, D, because weight (C) can be used for dual-home network scenarios. Weight is only locally relevant, however, if there is only one border router for eBGP peering it can be used to manipulate outbound traffic out of one AS towards other ASs. https://community.cisco.com/t5/other-network-architecture-subjects/bgp-inbound-and-outbound-traffic/td-p/337728 I do not doubt that B (AS-path prepend) is correct, too. I just can't choose between B and C. As-path prepend used outbound is also possible. Example: https://blog.ipspace.net/2009/03/as-path-prepending-technical-details.html
Source: Adapted from community discussion — HungarianDish_111
Keyboard:J Kmove between questionsA–Dselect an answerRshow or hide the answer← →change page
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