ICND1 Network Fundamentals & IP Addressing 5

Question 1

What is the number of usable host addresses in a /30 subnet?

Accepted Answer

2

Answer

A /30 leaves 2 host bits: 2^2 - 2 = 2 usable hosts, making it ideal for point-to-point WAN links.

Question 2

Which encapsulation type is used by default on a Cisco serial interface running HDLC?

Accepted Answer

Cisco HDLC

Answer

Cisco serial interfaces default to Cisco's proprietary HDLC encapsulation, which differs from the ISO HDLC standard.

Question 3

A host sends a packet to 255.255.255.255. What kind of message is this?

Accepted Answer

Limited broadcast

Answer

255.255.255.255 is the limited broadcast address, delivered to all hosts on the local network segment only.

Question 4

In the OSI model, which layer handles the conversion of data formats such as encryption and compression?

Accepted Answer

Presentation

Answer

The Presentation layer (Layer 6) translates data formats, handles encryption/decryption, and compression.

Question 5

Which network address belongs to the same /27 subnet as host 192.168.5.100?

Accepted Answer

192.168.5.96

Answer

A /27 has a block size of 32; 96 ≤ 100 < 128, so the network address is 192.168.5.96.

(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test