IPv4 Addressing and Subnetting

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What is the CIDR prefix that represents the aggregated network 128.143.0.0/16 and 128.144.0.0/16?

128.143.0.0/15
128.142.0.0/15 (correct)
128.145.0.0/15
128.144.0.0/15

What is the meaning of 'longest prefix match' in the context of routing table lookups?

The routing table entry with the longest prefix length is selected. (correct)
The routing table entry with the most specific subnet mask is selected.
The routing table entry with the shortest prefix length is selected.
The routing table entry with the least specific subnet mask is selected.

What is the outgoing interface for the IP address 128.143.137.0/24?

interface #3
interface #5
interface #1 (correct)
interface #2

How can route aggregation be exploited when IP address blocks are assigned in a hierarchical fashion?

By advertising less specific prefixes to upstream networks. (B) Signup and view all the answers

What prefix does ISP X use to send all traffic to Company X?

206.0.68.0/22 (C) Signup and view all the answers

If organization z2 moves from ISP Y to ISP X, what effect would this have on the routing information?

Both a and b are correct. (C) Signup and view all the answers

What problem did the original classful IP address scheme face in the early 1990s?

Flat address space (C) Signup and view all the answers

In classful IP addressing, what became a problem when Class C networks were widely used?

Insufficient number of available network addresses (D) Signup and view all the answers

What was the main goal of CIDR (Classless Interdomain Routing)?

Restructure IP address assignments to increase efficiency (A) Signup and view all the answers

What does CIDR (Classless Interdomain Routing) notation of an IP address include?

The length of the network prefix in the IP address (B) Signup and view all the answers

What is the purpose of subnetting in networking?

To allocate a separate network address for each network (D) Signup and view all the answers

What is a key concept of CIDR (Classless Interdomain Routing)?

Arbitrary network prefix lengths (C) Signup and view all the answers

What is one benefit of CIDR in terms of route aggregation?

Reduces route table entries by permitting route aggregation (A) Signup and view all the answers

Which range of IP addresses is an example of a reserved private address block as per RFC 1918?

172.16.0.0 - 172.31.255.255 (C) Signup and view all the answers

In subnetting, what does CIDR stand for?

Classless Inter-Domain Routing (D) Signup and view all the answers

What does CIDR notation represent?

It represents the subnet mask along with the network prefix (B) Signup and view all the answers

Which of the following is a benefit of adding subnetting to an organization's IP addressing structure?

Allowing each part of the organization to have locally administered IP addresses (A) Signup and view all the answers

What is the basic idea behind subnetting an IP address?

To split the host number part into a subnet number and a smaller host number (D) Signup and view all the answers