IEEE Standards

Question 1

802.1d

Answer 1

STP: The Spanning Tree Protocol is part of the 802.1d standard and avoids loops in the switching network (layer 2).

Question 2

802.1q

Answer 2

VLANs: The 802.1q standard is used to define virtual LANs (VLANs) on an ethernet network.

Question 3

802.11

Answer 3

Wi-Fi Networks: Operates as infrastructure or ad hoc

Question 4

802.3ad

Answer 4

Link Aggregation: The combining (aggregating) of multiple network connections in parallel.
▪ provides increase throughput vs. a single connection
▪ provides redundancy in case of a link failure

Question 5

802.3af

Answer 5

PoE: Provides up to 15.4 W of power to device (Cat 5 or above)

Question 6

802.3at

Answer 6

PoE+: Provides up to 25.5 W of power to device (Cat 5 or above)

Question 7

802.1x

Answer 7

User Authentication:
[Involves a supplicant (client device), an authenticator (network device), and an authentication server.

▪ Supplicant is a client device (such as a laptop);
▪ Authenticator is a network device (switch, WAP) that provides a data link between the client and the network;
▪ Authentication server is a trusted server that can receive and respond to requests for network access.

Question 8

802.11a

Answer 8

5 GHz; 54 Mbs

Question 9

802.11b

Answer 9

2.4 GHz; 11 Mbps

Question 10

802.11g

Answer 10

2.4 GHz, up to 54 Mbs

Question 11

802.11n

Answer 11

2.4 [150 Mbs] and 5 GHz [600 Mbs] (WiFi 4); First introduced MIMO (Multiple-Input and Multiple-Output) support.

Question 12

802.11ac

Answer 12

5 GHz (3 Gbs); WiFi 5; MU-MIMO (Multi User Multiple Input-Multiple-Output)

Question 13

802.11ax

Answer 13

2.4, 5, and 6GHz; 9.6 Gbs; MU-MIMO (Multi User Multiple Input-Multiple-Output)

Question 14

802.11i

Answer 14

Wi-Fi Protected Access 2 (WPA2) - An amendment to the original 802.11 specification.