802 Standards

Question 1

802.3

Answer 1

Ethernet

Question 2

802.11

Answer 2

Wireless network
Also security standard (WEA)

Question 3

802.3ad

Answer 3

Link aggregation
Combined multiple ports to help with congestion

Question 4

802.3af

Answer 4

PoE
15.4 watts / cat5 or higher

Question 5

802.3at

Answer 5

PoE+
25.5 watts / cat5 or higher

Question 6

802.1x

Answer 6

User authentication
-framework used for port-based authentication
-opens ports for network access when an organization authenticates a user’s identity and authorizes them for access to the network (port security)
-uses RADIUS or TACACS+
-supplicant, authenticator, and authentication server(radius or TACACS+ server)
-most common NAC mechanisms

Question 7

802.1D

Answer 7

Spanning Tree Protocol (STP)
Permits redundant links and prevents traffic loops

Question 8

802.1q

Answer 8

-defines VLAN tagging for Ethernet frames to be used by switches in handling such frames.
-if VLAN tagging is not enabled, all VLAN traffic combined over that single cable will be sent to native VLAN (VLAN 1).

-VLAN Trunking
Multiple VLANs transmitted over same physical cable

Question 9

802.11a

Answer 9

Wireless
5 GHz
54 Mbps

Question 10

802.11b

Answer 10

Wireless
2.4 GHz
11 Mbps

Question 11

802.11g

Answer 11

Wireless
2.4 GHz
54 Mbps

Question 12

802.11n
(WiFi 4)

Answer 12

Wireless
2.4 and 5 GHz
150 Mbps / 600 Mbps(MIMO)

Question 13

802.11ac
(WiFi 5)

Answer 13

Wireless
5 GHz
3 Gbps (MU-MIMO)

Question 14

802.11ax
(WiFi 6)

Answer 14

2.4, 5, and 6 GHz
9.6 Gbps (MU-MIMO)

Question 15

802.11i

Answer 15

Wireless security
WPA2

Question 16

802.1ab

Answer 16

Link Layer Discovery Protocol (LLDP)
-used by network devices to send and receive info about their identity and capabilities (VLAN names, port names, and link aggregation data)