Section 2.3

Question 1

What does MAC stand for?

Answer 1

Media Access Control

Question 2

How many bytes long is a MAC address?

Answer 2

6 bytes

Question 3

What is the first section of the MAC address called?

Answer 3

OUI: Organizationally Unique Identifier/Manufacturer’s ID

Question 4

What is the second section of the MAC address called?

Answer 4

NICS: Network Interface Controller-Specific/Serial number

Question 5

What is Full Duplex

Answer 5

Data can be sent and received at the same time

Question 6

Switch vs Hub, which does half vs full duplex

Answer 6

Switches do full, hubs do half

Question 7

What happens when there’s a transmission collision on a hubbed network?

Answer 7

The network hears the collision, waits a random amount of time and tries again

Question 8

Command to list all MAC and associated IP addresses

Answer 8

arp -a

Question 9

What does ARP stand for?

Answer 9

Address Resolution Protocol

Question 10

What does ARP do?

Answer 10

Similar to DNS and NAT, it translates between IP and MAC addresses

Question 11

What does VLAN stand for?

Answer 11

Virtual Local Area Network

Question 12

What’s the purpose of VLAN?

Answer 12

to divide up a single switch for multiple LANs

Question 13

What is a VLAN trunk?

Answer 13

A VLAN trunk allows you to connect the VLANs of one switch to another’s using a single connection

Question 14

How does data on a VLAN trunk know where to go?

Answer 14

Data that enters a VLAN trunk is tagged so it knows where to go at its destination

Question 15

What prevent data from looping endlessly in Layer 3?

Answer 15

Time To Live/TTL

Question 16

What prevents data from looping endlessly in Layer 2?

Answer 16

Rapid Spanning Tree Protocol/RSTP