Subnetting Techniques Mastery

What is subnetting and why is it used?

• Subnetting is used to create smaller networks within a larger network for better management, performance, and security.

• Subnetting is used to eliminate the need for IP addresses.

• Subnetting is a method to increase the size of a network.

• Subnetting is a technique for improving internet speed globally.

Explain the difference between public and private IP addresses.

• Public IP addresses are used for local networks; private IP addresses are routable on the internet.

• Public IP addresses are assigned by local routers; private IP addresses are assigned by ISPs.

• Public IP addresses are always static; private IP addresses are always dynamic.

• Public IP addresses are routable on the internet; private IP addresses are used within local networks and are not routable.

How do you calculate the number of hosts in a subnet?

• subnet mask bits * 2

• 2^(32 + subnet mask bits) + 2

• 2^(subnet mask bits) - 2

• 2^(32 - subnet mask bits) - 2

What is CIDR and how does it relate to subnetting?

• CIDR is a method for IP address allocation that allows for flexible subnetting.

• CIDR eliminates the need for any form of subnetting.

• CIDR is only used for IPv6 addresses.

• CIDR is a type of firewall configuration.

Describe the process of subnetting a Class C network.

• To subnet a Class C network, determine the number of subnets needed, adjust the subnet mask by borrowing bits from the host portion, and assign IP addresses accordingly.

• The process involves only changing the default gateway.

• Subnetting a Class C network requires only a default mask.

• Class C networks cannot be subnetted at all.

What is the subnet mask for a /24 CIDR notation?

• 192.168.1.1

• 255.255.0.0

• 255.255.255.0

• 255.255.255.255

How do you determine the network address from an IP address and subnet mask?

• Network Address = IP Address AND Subnet Mask

• Network Address = IP Address - Subnet Mask

• Network Address = IP Address + Subnet Mask

• Network Address = IP Address OR Subnet Mask

What is the purpose of a default gateway in a subnet?

• To assign IP addresses to devices within the subnet.

• The purpose of a default gateway in a subnet is to route traffic from the local network to external networks.

• To manage the bandwidth of the local network.

• To provide a backup for local devices in case of failure.

Explain the concept of VLSM (Variable Length Subnet Masking).

• VLSM requires all subnets to have the same subnet mask.

• Variable Length Subnet Masking (VLSM) is a technique that enables the use of different subnet masks for different subnets within the same network, allowing for more efficient use of IP addresses.

• VLSM is a technique used only in IPv6 networks.

• VLSM is a method for creating static IP addresses for all devices.

What are the advantages of subnetting in network design?

• Higher costs for IP addresses

• Increased network latency

• Limited scalability

• Advantages of subnetting include improved performance, enhanced security, better IP address management, and efficient use of address space.