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Q65. Which of the following applications would be likely to use UDP? 

A. Real-time audio application, such as VoIP 

B. Web browser 

C. Email application 

D. Telnet 

Answer: A 


Q66. What is the purpose of TCP flow control? 

A. It restricts the sender from sending too much data when there is congestion in the network. 

B. It allows the receiver to control the rate at which the sender transmits data. 

C. It forces the sender to send only one segment at a time. 

D. It allows the receiver to drop segments without the sender having to retransmit. 

Answer: B 


Q67. What is required if devices on different VLANs wish to communicate with each other? 

A. Devices on different VLANs cannot communicate with each other. 

B. Devices on different VLANs can communicate with each other as long as they are connected to the same switch. 

C. Devices on different VLANs can communicate with each other as long as the switches they are attached to are connected to each other with an Ethernet connection. 

D. Devices on different VLANs can communicate with each other if there is an IP router to connect the VLANs. 

Answer: D 


Q68. How does a VPRN service avoid the problem of overlapping IP addresses from different customers? 

A. You cannot have overlapping IP addresses. Customers must change their IP address assignment. 

B. Each VPRN service maintains a separate VPN routing and forwarding instance to separate customer routing information. This allows for overlapping addresses. 

C. A VPRN ignores IP addressing information and uses MAC addressing instead, which are always unique. 

D. A VPRN translates customer IP addresses to a private addressing scheme administered 

by the service provider. 

Answer: B 


Q69. Which of the following statements is FALSE when describing a Virtual Private LAN Service? 

A. A VPLS emulates a virtual switch or bridge. 

B. The VPLS performs MAC learning on MAC addresses seen from SAPs and SDPs. 

C. When a VPLS receives a frame with an unknown MAC destination, the frame will be dropped. 

D. MAC addresses are maintained in a MAC address forwarding database (FDB). 

Answer: C 


Q70. Address summarization reduces the routing table size by: 

A. Allowing a contiguous block of network addresses to be represented by one network prefix. 

B. Increasing the number of addresses in the routing table. 

C. Summarizing addresses in the network into smaller routing tables. 

D. Not advertising directly connected routes. 

Answer: A 


Q71. Based on the network diagram (click the Exhibit Button), 

what is the next-hop used on R1 to setup a static route to the network on CR1? 

A. next-hop 10.2.3.2 

B. next-hop 192.168.2.1 

C. next-hop 10.2 3.1 

D. next-hop 192.168.2.0 

Answer: C 


Q72. What capability of TCP/IP allows two hosts to have multiple TCP sessions to each other simultaneously? 

A. The combination of IP source and destination address and TCP source and destination port uniquely identifies each session. 

B. The combination of IP source and destination address and the IP protocol field uniquely identifies each session. 

C. The hosts can identify the sessions using each others MAC addresses. 

D. Two hosts can not have multiple TCP sessions simultaneously. 

Answer: A