Network Implementations

Question 1

What is a VLAN and why is it used?

Answer 1

A VLAN (Virtual Local Area Network) logically segments networks to improve security and reduce traffic.

Question 2

What is the difference between RIP, OSPF, and BGP?

Answer 2

RIP is a distance-vector protocol, OSPF is a link-state protocol, and BGP is a path-vector protocol used for internet routing.

Question 3

What are the differences between 802.11a/b/g/n/ac/ax standards?

Answer 3

Differences include frequency bands, data rates, and range, with 802.11ax (Wi-Fi 6) being the latest with higher efficiency and speed.

Question 4

What is the difference between cut-through, store-and-forward, and fragment-free switching?

Answer 4

Cut-through sends data as soon as the destination address is read, store-and-forward checks the entire frame for errors before forwarding, and fragment-free checks the first 64 bytes for collisions.

Question 5

What are common WAN technologies?

Answer 5

MPLS, Metro Ethernet, Frame Relay, T1/T3, ISDN, and DSL.

Question 6

What is the difference between unicast and multicast traffic?

Answer 6

Unicast is one-to-one communication, multicast is one-to-many communication, where data is sent to multiple recipients.

Question 7

What are the ranges for IPv4 address classes A, B, C, D, and E?

Answer 7

Class A: 1.0.0.0 to 126.0.0.0, Class B: 128.0.0.0 to 191.255.0.0, Class C: 192.0.0.0 to 223.255.255.0, Class D: 224.0.0.0 to 239.255.255.255, Class E: 240.0.0.0 to 255.255.255.255.