10 Questions
In classful addressing, what is a major drawback in terms of address space?
Limited network size choices
What is the purpose of a subnet mask in networking?
To determine if another IP address is on the same subnet or network
When using class B network 166.113.0.0 with a total of 15 subnets and the largest having 450 hosts, how many host bits are needed for subnetting?
12 host bits
For an organization with multiple subnets assigned the address 150.100.0.0, each with up to 120 hosts, what is the maximum number of subnets?
2048 subnets
What is a significant advantage of classless addressing (CIDR) over classful addressing?
Increased flexibility in address allocation
What is the function of the network layer in computer networks?
Move packets from sending to receiving host
What does IP addressing provide for each host in a network?
32 bits (4 bytes) unique value
What is the purpose of the prefix (network ID) in IP addressing?
Identifies the network to which the host attaches
What is the significance of the 2-level hierarchy in IP addressing?
Enables identification of both the network and the individual host
What does the network layer forwarding function involve?
Moving packets from an input link to the output link
Study Notes
Classful Addressing
- A major drawback of classful addressing is its limited address space.
Subnet Mask
- The purpose of a subnet mask in networking is to determine the scope of a subnet.
Subnetting
- For a class B network 166.113.0.0 with 15 subnets, the largest having 450 hosts, 9 host bits are needed for subnetting.
Subnetting and Hosts
- For an organization with multiple subnets assigned the address 150.100.0.0, each with up to 120 hosts, the maximum number of subnets is 26 (2^6, since 6 bits are available for subnetting).
Classless Addressing (CIDR)
- A significant advantage of classless addressing (CIDR) over classful addressing is its ability to provide more efficient allocation of address space.
Network Layer
- The function of the network layer in computer networks is to provide routing and congestion control.
IP Addressing
- IP addressing provides a unique logical address for each host in a network.
Prefix (Network ID)
- The purpose of the prefix (network ID) in IP addressing is to identify the network portion of an IP address.
IP Addressing Hierarchy
- The 2-level hierarchy in IP addressing is significant because it allows for the separation of the network ID and host ID.
Network Layer Forwarding
- The network layer forwarding function involves routing data packets between networks based on their destination IP addresses.
Test your understanding of the network layer with this quiz based on Lecture 6 of Introduction to Computer Networks in the Winter Semester, 2018, taught by Prof. Amal ElNahas.
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