ICND1 Network Fundamentals & IP Addressing 4

Question 1

Which IPv4 address range is reserved for multicast?

Accepted Answer

224.0.0.0 – 239.255.255.255

Answer

Class D addresses (224.0.0.0–239.255.255.255) are reserved for multicast group communication.

Question 2

A network administrator needs at least 50 subnets from 10.0.0.0/8. What is the minimum number of bits to borrow?

Accepted Answer

6

Answer

2^6 = 64 ≥ 50 subnets; borrowing 5 bits only yields 32, which is insufficient.

Question 3

Which statement correctly describes full-duplex Ethernet operation?

Accepted Answer

Devices can send and receive simultaneously, eliminating collisions

Answer

Full-duplex allows simultaneous send and receive by using separate wire pairs, eliminating collision domains.

Question 4

What is the CIDR notation for the subnet mask 255.255.255.192?

Accepted Answer

/26

Answer

255.255.255.192 = 11111111.11111111.11111111.11000000, which has 26 contiguous 1-bits.

Question 5

Which private IP address range is defined by RFC 1918 for Class A networks?

Accepted Answer

10.0.0.0 – 10.255.255.255

Answer

RFC 1918 designates 10.0.0.0/8 as the private Class A range.

(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test