Ethernet Switch Standards

Question 1

802.3ad

Answer 1

Link Aggregation
-Combines multiple physical connections into a single logical connection to minimize or prevent congestion

Question 2

802.3af / 802.3at

Answer 2

Power Over Ethernet (PoE / PoE+)
-Supplies electrical power over Ethernet and requires CAT5 or higher copper cable
-PoE 802.3af: up to 15.4 watts / PoE+ 802.3at: up to 25.5 watts

Question 3

802.1x

Answer 3

User Authentication
-Requires users to authenticate themselves before gaining access to the network

Question 4

Link Aggregation

Answer 4

802.3ad
-Combines multiple physical connections into a single logical connection to minimize or prevent congestion

Question 5

Power Over Ethernet (PoE / PoE+)

Answer 5

802.3af / 802.3at
-Supplies electrical power over Ethernet and requires CAT5 or higher copper cable
-PoE 802.3af: up to 15.4 watts / PoE+ 802.3at: up to 25.5 watts

Question 6

User Authentication

Answer 6

802.1x
-Requires users to authenticate themselves before gaining access to the network

Question 7

802.1d

Answer 7

Spanning Tree Protocol
-Permits redundant links between switches and prevents looping of network traffic
-SPB (Shortest Path Bridging): used instead of STP for larger network environments
-Faster cables have lower cost, while slower cables have higher cost

Question 8

Spanning Tree Protocol

Answer 8

802.1d
-Permits redundant links between switches and prevents looping of network traffic
-SPB (Shortest Path Bridging): used instead of STP for larger network environments
-Faster cables have lower cost, while slower cables have higher cost

Question 9

802.1q

Answer 9

VLAN Trunking
-Allows for multiple VLANs transmitted over the same physical cable