1. Refer to the exhibit. RouterA, RouterB, and RouterC in the diagram are running OSPF on their Ethernet interfaces. Router D was just added to the network. Routers are configured with the loopback interfaces (Lo 0) that are shown in the exhibit. What happens to the OSPF DR/BDR after RouterD is added to the network?
RouterB takes over as DR and RouterD becomes the BDR.
RouterD becomes the BDR and RouterA remains the DR.
RouterD becomes the DR and RouterA becomes the BDR.
RouterC acts as the DR until the election process is complete.
RouterD becomes the DR and RouterB remains the BDR.
There is no change in the DR or BDR until either current DR or BDR goes down.
2. Refer to the exhibit. How many OSPF adjacencies must be formed to build the complete topology if a DR or BDR were not elected in this OSPF network?
3. What is the default administrative distance for OSPF?
1. Refer to the exhibit. What does JAX do with link-state packets from ORL?
sends out its updated routing table to both ORL and BOS routers
sends out the individual link-state packets out the interface connected to BOS
queries BOS to see if it has a better route
only adds it to the local routing table and performs no other actions
2. What two events will cause a link state router to send LSPs to all neighbors? (Choose two.)
30 second timer expires
whenever the network topology changes
immediately after the Bellman-Ford algorithm has run
immediately after the DUAL FSM has built the topology database
upon initial startup of router or routing protocol
3. What are two advantages of using a link-state routing protocol instead of a distance vector routing protocol? (Choose two.)
The topology database eliminates the need for a routing table.
Each router independently determines the route to each network.
Link-state protocols require less router processor power than distance vector protocols.
After the inital LSP flooding, they generally require less bandwidth to communicate changes in a topology.
Frequent periodic updates are sent to minimize the number of incorrect routes in the topological database.
1. Refer to the exhibit. EIGRP is the only routing protocol enabled on this network. No static routes are configured on this router. What can be concluded about network 198.18.1.0/24 from the exhibited output?
A route to network 198.18.1.0/24 is not listed in the routing table.
Packets that are destined for 198.18.1.0/24 will be forwarded to 198.18.10.6.
EIGRP will perform equal cost load balancing across two paths when forwarding packets to 198.18.1.0/24.
The router with interface 172.16.3.2 is a successor for network 198.18.1.0/24.
2. Refer to the exhibit. All interfaces have been configured with the bandwidths that are shown in the exhibit. Assuming that all routers are using a default configuration of EIGRP as their routing protocol, what path will packets take from the 172.16.1.0/16 network to the 192.168.200.0/24 network?
Packets will load balance across the A,B,E and A,C,E paths.
Packets will load balance across the A,B,E and A,D,E paths.
Packets will load balance across the A,C,E and A,D,E paths.
3. Which of the following statements describes the bounded updates used by EIGRP?
Bounded updates are sent to all routers within an autonomous system.
Partial updates are sent only to routers that need the information.
The updates are sent to all routers in the routing table.
Updates are bounded by the routers in the topology table.
1. Refer to the exhibit. What parent network will automatically be included in the routing table when the three subnets are configured on Router1?
2. Refer to the exhibit. The network administrator has discovered that packets destined for servers on the 172.16.254.0 network are being dropped by Router2. What command should the administrator issue to ensure that these packets are sent out the gateway of last resort, Serial 0/0/1?
no ip classless
ip default-network 0.0.0.0
ip default-gateway 172.16.254.1
ip route 0.0.0.0 0.0.0.0 Serial 0/0/1
3. A network is converged and the routing tables are complete. When a packet needs to be forwarded, what is the first criterion used to determine the best path in the routing table?
the route with the smallest AD
the route with the longest address and mask match to the destination
the route with the highest bandwidth
the route with the best combination of AD and lowest cost
1. A network administrator installed four new routers that are running RIPv2. Router1 is a boundary router in the RIPv2 network and has a default route configured. Once the network has converged, the network administrator enters Router1(config-router)# default-information originate on Router1. How will this affect the network?
prevents Router1 from forwarding updates about networks that are not directly connected
causes all routers in the network to synchronize routing updates with Router1
forces Router1 to become the primary or designated router (DR) for updates
propagates the default route to all routers in the network
2. What field was added to the RIP message header by RFC 1723 to add support for VLSM and CIDR?
destination port number
address family identifier
source and destination IP addresses
3. Refer to the exhibit. Which command on which router will allow Router1 to learn about the 192.168.0.0/20 network?
Router1(config)# ip classless
Router1(config-router)# no passive-interface serial 0/1/1
Router2(config-router)# version 2
Router2(config-router)# neighbor 10.0.0.2