Which of the following is an important advantage of protocol layering? (Choose two)

1. A. Controls distribution of IP addresse
2. B. Simplifies protocol functionalit
3. C. Isolates changes in lower layers from upper layer
4. D. Increases protocol operational efficiencie
5. E. Layering adds to the fragmentation of the data

Correct Answer: CD

Address summarization reduces the routing table size by:

1. A. Allowing a contiguous block of network addresses to be represented by one network prefi
2. B. Increasing the number of addresses in the routing tabl
3. C. Summarizing addresses in the network into smaller routing table
4. D. Not advertising directly connected route

Correct Answer: A

What is the purpose of the broadcast address?

1. A. Provides an address that refers to all the devices in a given networ
2. B. Provides an address to refer to a specific group of devices in a given networ
3. C. Provides an address to refer to a group of devices having the same IP addresses in different Layer 2 network
4. D. Provides an address to refer to a single device on a given networ

Correct Answer: A

Which of the following statements best describe the purpose of UDP? (Choose two)

1. A. Provides a connectionless delivery servic
2. B. Provides a connection oriented delivery service
3. C. Provides an unreliable transmission service,
4. D. Provides a reliable transmission servic

Correct Answer: AC

Which of the following best describes an autonomous system?

1. A. An autonomous system is a network or group of networks operating under one administrative authorit
2. B. An autonomous system is another term for the collection of routers that make up the Internet
3. C. An autonomous system is a network or group of networks from many organizations running different IGP routing protocols, but all running BG
4. D. An autonomous system is a loosely defined term that can refer to any organization that has a connection to the Interne

Correct Answer: A