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Q33. In the diagram, R3 receives an LSA with the sequence number 111 from R7 and then receives another copy of the LSA with a sequence number 112 from R1. What does R3 do with the LSA from R1?
A. R3 discards the LSA received from R1 and sends a copy of the LSA from its link state base to R1.
B. R3 installs the LSA received from R1 in its link state database and floods a copy to its neighbors.
C. R3 discards the LSA received from R1 and sends an ACK to R1.
D. R3 installs the LSA received from R1 in its link state database, sends an ACK to R1 andfloods a copy to its neighbors.
Answer: D
Q34. Which of the following statements best describe the purpose of UDP? (Choose two)
A. Provides a connectionless delivery service.
B. Provides a connection oriented delivery service
C. Provides an unreliable transmission service,
D. Provides a reliable transmission service.
Answer: A,C
Q35. Which field in the IP routing table contains the name or address of the neighbour that advertised the prefix to the router?
A. Preference.
B. Metric.
C. Dest prefix.
D. Next hop.
Answer: D
Q36. Given a network address of 116.14.0.0, which of the following is a valid host address when using the subnet mask 255.255.255.240?
A. 116.14.17.16
B. 116.14.17.31
C. 116.14.17.192
D. 116.14.17.189
Answer: D
Q37. Which of the following statements BEST describes the purpose of UDP (Select two)?
A. Provide a connectionless delivery service.
B. Provide a connection oriented delivery service.
C. Provide an unreliable transmission service.
D. Provide a reliable transmission service.
Answer: A,C
Q38. Which answer reflects the correct message sequence used when a source attempts to ping a destination for which it has no Address Resolution Protocol (ARP) cache entry?
A. ICMP echo request, ARP request, ARP reply, ICMP echo reply
B. ARP request, ARP reply, ICMP echo request, ICMP echo reply
C. ICMP echo request, ICMP echo reply, ARP request, ARP reply
D. ICMP echo request. ARP reply, ARP request, ICMP echo reply
Answer: B
Q39. Host A is transmitting data to host B on a TCP connection. What is the purpose of the ACK sent by host B?
A. The ACK tells the host A that host B wishes to establish a session.
B. The ACK tells host A the sequence number of the segment that was just received by host B.
C. The ACK tells host A the sequence number of the next segment that host B expects to see.
D. The ACK is flow control from host B and tells host A to reduce its transmission rate.
Answer: C
Q40. Which of the following is typically a characteristic of Layer 2 framing?
A. Provides a universal addressing scheme to uniquely identify destinations in the network.
B. The size of the Layer 2 frame cannot exceed 1518 bytes.
C. Provides error checking of the frame contents after transmission.
D. All the above.
Answer: C