Layer 3

Question 1

Network Layer

Answer 1

Forwards traffic, routing, with logical address/using IP address

Question 2

Network Layer

Answer 2

Forwards traffic, routing, with logical address/using IP address

Question 3

Routing

Answer 3

Also called Layer 3 Switching,

Question 4

Packet Switching

Answer 4

Data is divided into packets and then forwarded based on its IP address (most networks use packet switching)

Question 5

Circuit Switching

Answer 5

Dedicated communication link is established between two devices (think of a phone call getting switched on & all of the data is going back and forth as we talk) Switchboard operator

Question 6

Message Switching

Answer 6

Data is divided into messages which may be stored and then forwarded (It has a store and forward capability)

Question 7

Route Discovery & Selection

Answer 7

Manually configured as a static route or dynamically through a routing protocol

Question 8

Internet Control Message Protocol (ICMP)

Answer 8

Sends error messages and operational information to an IP destination. Most commonly used one is known as PING. PING is usually used on Admin level to troubleshoot out network.

Question 9

Layer 3 Devices

Answer 9

Routers & Multilayer switches (regular switch & router combined)

Question 10

Layer 3 protocols example

Answer 10

IPv4 & IPv6