CCNA Questions And Answers


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The network block size is 256-252 or 4, so the network address of this network is 172.16.10.8. The next
network is 172.16.10.12, so the broadcast of the 172.16.10.8 is one less than the next network address or 172.16.10.11.

Chapter: 4


189. Which of the following are used to stop network loops in a distance vector network? (Choose all that apply.)
A. STP
B. Route poisoning C. Split horizons D. Holddowns
Answer: B, C Route poisoning and split horizons are used to stop network loops from occurring in distance vector
networks.
Chapter: 4


190. Which layer of the OSI uses PDU's called segments?

A. Application B. Session
C. Transport
D. Network
Answer: C
The Application and Session layers only references data and the Network layer references a PDU know as a
Packet. The Transport layer's PDU is known as a Session.
Chapter: 4


191. Which layer of the OSI uses PDU's called frames?
A. Data-Link
B. Session
C. Transport D. Network

Answer: A
The Session layer only references data, the Network layer references a PDU know as a Packet and the
Transport layer's PDU is known as a Session. The Data-link layer PDU is known as a frame.
Chapter: 4