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2021 Dec 4A0-100 exam prep

Q111. In what type of network is a broadcast storm likely to occur? 

A. An Ethernet network with redundant paths not running STP. 

B. An ATM network. 

C. A SONET network. 

D. All of the above. 

Answer: A 


Q112. What are some of the characteristics of BGP? Choose three 

A. BGP is an exterior gateway protocol. 

B. BGP routing is based on distance vector. 

C. BGP sends periodic updates to its neighbors. 

D. A router running BGP protocol needs an Autonomous system number 

Answer: A,B,D 


Q113. What does a VPLS solution look like from a customers perspective? 

A. To the customer, it appears as if all sites are directly connected by a single cable. 

B. To the customer, it appears as if all sites are connected through a single switched LAN. 

C. To the customer, it appears as if all sites are connected through a single router. 

D. To the customer, it appears as if all sites are connected through a series of private point-to-point connections. 

Answer: B 


Q114. A 24 port Ethernet switch is configured with VLAN 100 on ports 1 - 8, VLAN 200 on ports 9 

-

16 and VLAN 300 on ports 17 - 24. Which of the following describes the behavior of the switch when a broadcast frame is received on port 1? 

A. 

The switch will discard the broadcast frame because there is no specific destination address. 

B. 

The switch will flood the broadcast frame on all ports on which the switch has seen frames from attached devices 

C. 

The switch will flood the broadcast frame on ports 2 to 8. 

D. 

The switch will flood the broadcast frame on all 24 ports. 

Answer: C 


Q115. How many DS-3 frames can be transported in an OC-3 frame? 

A. 1 

B. 2 

C. 3 

D. 4 

Answer: C 


Update 4A0-100 sample question:

Q116. What is the name for an organization that provides Internet services to its customers? 

A. A large corporation. 

B. An ISP. 

C. A home based business. 

D. A content provider. 

Answer: B 


Q117. 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 


Q118. How does the Transport Layer identity which application is to receive the data? 

A. By using the IP address of the packet. 

B. By using the MAC address of the frame. 

C. By using port numbers. 

D. By using Connection Identifier Numbers (CINs). 

Answer: A 


Q119. Which of the following describes a static default route? 

A. A routing entry, included in the RIB by default, that forwards packets with an unknown destination to the CPM for inspection. 

B. A manual entry used when the destination address of a network is not specifically listed in the routing table. 

C. A manual entry that matches a specific /32 host address using the least cost to the destination. 

D. A default entry in the FIB used when forwarding multicast and broadcast packets. 

Answer: B 


Q120. How is Ethernet II different from Ethernet 802.3? 

A. Ethernet 802.3 can only be used on point-to-point links, while Ethernet II can be used on broadcast networks. 

B. In Ethernet II the 2 bytes after the source MAC address is used as a type indicator. In Ethernet 802.3 these two bytes indicate the length of the frame. 

C. In Ethernet 802.3, the 2 bytes after the source MAC address is used as a type indicator. In Ethernet II these two bytes indicate the length of the frame. 

D. Ethernet II and Ethernet 802.3 are two different names for the same protocol 

Answer: B