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2021 Aug 4A0-100 practice test
Q101. What happens in a TCP session if a segment is not acknowledged within a certain time period?
A. The missing segment is retransmitted.
B. The TCP session is terminated.
C. The sender sends the next segment.
D. An ICMP destination unreachable message is sent.
Answer: A
Q102. Which of the following type of addressing scheme delivers information from one source to all devices who are members of a specific group?
A. Anycast.
B. Multicast.
C. Broadcast.
D. Unicast.
Answer: B
Q103. Which of the following best describes a repeater?
A. A passive device simply used to connect two or more cables. It does not generate or amplify any signals.
B. A device that receives and retransmits a signal out its ports but does not do any Layer 2 analysis of the data.
C. A device that receives a signal and based on the Layer 2 destination address, makes a decision on which ports the signal should be retransmitted.
D. A device that receives a signal and based on the Layer 3 destination address makes a decision on which ports the signal should be retransmitted.
Answer: B
Q104. Which three of the following are important considerations when designing subnets? (Choose three.)
A. Number of subnetworks currently required.
B. Type of physical connectivity used by each segment.
C. Future network growth requirements.
D. Number of hosts each subnetwork will support.
E. Class of the network address to be used for the network.
Answer: A,C,D
Q105. What bit pattern identifies the network address in the subnet mask?
A. A string of 1s
B. A string of 0s
C. A string of alternating 10s
D. There is no specific bit pattern to identify the network address.
Answer: A
Abreast of the times 4A0-100 answers:
Q106. A CE device has a physical connection to which device in the service providers MPLS network?
A. CE always connects to a PE router.
B. CE always connects to a P router.
C. CE always connects to another CE device.
D. The CE does not connect to the service provider network.
Answer: A
Q107. What kind of information can a Dynamic Host Configuration Protocol (DHCP) client receive?
A. Details of the configuration settings of each router on the network.
B. A list of other DHCP clients.
C. IP addresses and their lease times.
D. Server time information
Answer: C
Q108. If a customer requires a point-to-point layer 2 VPN service between two locations which VPN service would be typically suited for this customer?
A. Virtual Private Wire Service .
B. Virtual Private LAN Service.
C. Virtual Private Routed Networks.
D. Virtual Private Dark Fiber Service.
Answer: A
Q109. In the diagram, R3 receives an LSA with sequence number 112 from R7 and installs it in its link state database. 10 ms. Later it receives a copy of the same LSA with a sequence number of 111 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 and floods a copy to its neighbors.
Answer: A
Q110. 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