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NO.1 Which two functions are performed by the DR in OSPF? (Choose two.)
A. The DR originates the network LSA on behalf of the network.
B. The DR is responsible for the flooding throughout one OSPF area.
C. The DR forms adjacencies with all other OSPF routers on the network, in order to synchronize the
LSDB across the adjacencies.
D. The DR is responsible for originating the type 4 LSAs into one area.
Answer: A,C

NO.2 What is a disadvantage of using aggressive mode instead of main mode for ISAKMP/IPsec
establishment?
A. It does not use Diffie-Hellman for secret exchange.
B. It does not support dead peer detection.
C. It does not support NAT traversal.
D. It does not hide the identity of the peer.
Answer: D

NO.3 In the DiffServ model, which class represents the highest priority with the highest drop
probability?
A. AF11
B. AF13
C. AF41
D. AF43
Answer: D

NO.4 With which ISs will an ISIS Level 1 IS exchange routing information?
A. Level 1 ISs
B. Level 1 ISs in the same area
C. Level 1 and Level 2 ISs
D. Level 2 ISs
Answer: B

NO.5 A GRE tunnel is down with the error message %TUN-5-RECURDOWN: Tunnel0 temporarily
disabled due to recursive routing error.
Which two options describe possible causes of the error? (Choose two.)
A. Incorrect destination IP addresses are configured on the tunnel.
B. There is link flapping on the tunnel.
C. There is instability in the network due to route flapping.
D. The tunnel mode and tunnel IP address are misconfigured.
E. The tunnel destination is being routed out of the tunnel interface.
Answer: C,E

NO.6 What is the function of an EIGRP sequence TLV packet?
A. to acknowledge a set of sequence numbers during the startup update process
B. to list the peers that should listen to the next multicast packet during the reliable multicast
process
C. to list the peers that should not listen to the next multicast packet during the reliable multicast
process
D. to define the initial sequence number when bringing up a new peer
Answer: C

NO.7 Which three statements about implementing a NAT application layer gateway in a network are
true? (Choose three.)
A. It allows client applications to use dynamic ports to communicate with a server regardless of
whether NAT is being used.
B. It maintains granular security over application-specific data.
C. It allows synchronization between multiple streams of data between two hosts.
D. Application layer gateway is used only in VoIP/SIP deployments.
E. Client applications require additional configuration to use an application layer gateway.
F. An application layer gateway inspects only the first 64 bytes of a packet before forwarding it
through the network.
Answer: A,B,C

NO.8 What is the most efficient way to confirm whether microbursts of traffic are occurring?
A. Monitor the output traffic rate using the show interface command.
B. Monitor the output traffic rate using the show controllers command.
C. Check the CPU utilization of the router.
D. Sniff the traffic and plot the packet rate over time.
Answer: D