Networking and Subnetting Concepts

A collection of flashcards covering key concepts related to networking, segmentation, subnetting, VLANs, and DHCP.

What is network segmentation?

The practice of dividing a network into multiple smaller networks to enhance security, improve performance, and simplify troubleshooting.

What are the benefits of network segmentation?

Enhancement of security, improvement of performance, and simplification of troubleshooting.

How are networks commonly segmented?

According to geographic locations, departmental boundaries, and device types.

What technique is used to better manage network traffic by dividing IP addresses into groups?

Subnetting.

What does a subnet mask do?

It helps determine which part of an IP address is the network ID and which is the host ID.

What does CIDR stand for?

Classless InterDomain Routing.

What is the significance of the number after the slash in CIDR notation?

It represents the number of bits that belong to the network ID.

What does VLSM allow for?

It allows subnets to be subdivided into smaller groupings, creating subnets of the right size.

What is DHCP relay?

A solution that allows one DHCP server to provide addresses to multiple subnets through a relay agent.

What are VLANs?

Virtual Local Area Networks that group ports on a switch to limit traffic to a smaller broadcast domain.

What is the purpose of VLAN tagging?

To identify which transmissions belong to each VLAN by adding a tag to Ethernet frames.

What is the difference between access ports and trunk ports on a switch?

Access ports connect a single node, while trunk ports manage traffic among multiple VLANs.

What is a broadcast domain?

A logical division of a network in which any broadcast sent will be received by all devices within the domain.

What is the maximum number of host IP addresses for a /26 subnet mask?

62 usable IP addresses.

What IP address and subnet mask indicates a Class C network?

An IP address of X.X.X.X with a subnet mask of 255.255.255.0.

What is an unmanaged switch?

A switch that provides plug-and-play simplicity with minimal configuration and has no assigned IP address.

What is the purpose of the first four blocks in an IPv6 address?

To identify the network and serve as the network prefix.