Week 7

Question 1

Overview of VLAN?

Answer 1

Virtual Local Area Networks are a way to organize and manage the switching of resources

Question 2

VLANs are widely deployed in?

Answer 2

Enterprise environment

Question 3

If all 26 ports are a part of VLAN1?

Answer 3

That means they are in the same segment and broadcast domain

Question 4

A VLAN is the partitioning of?

Answer 4

Single Broadcast Domain

Question 5

Reason for VLANs?

Answer 5

Administrative need to separate or to integrate network traffic

Question 6

Each VLAN can have?

Answer 6

its own DHCP server

Question 7

A switch environment can logically or virtually span?

Answer 7

Several Locations

Question 8

Trunk allows?

Answer 8

Integration of remote VLANs using just one physical medium

Question 9

How does trunk work?

Answer 9

Stamping or labelling the frames with the corresponding VLAN number

Question 10

PCs do not understand?

Answer 10

VLANs

Question 11

Types of ports?

Answer 11

Access

Trunk

Question 12

VLAN needs router for?

Answer 12

inter-VLAN communication

Question 13

Each VLAN has a separate?

Answer 13

Subnet

Question 14

Router on a stick?

Answer 14

Single link is used to connect router with the switch containing multiple VLANs

Question 15

Why is VLAN tagging required?

Answer 15

Traditional ethernet header has no field to indicate VLANs

Question 16

What is Trunk?

Answer 16

A link that carries multiple conversations

Question 17

VLAN Tag systems?

Answer 17

1. Proprietary Cisco Inter-Switch Link ISL

2. IEEE 802.1Q Open Standard for Virtual Bridged Local Area Networks

Question 18

Standard Ethernet Frame components?

Answer 18

Destination Address
Source Address
Ether-Type Length
Data
CRC

Question 19

Cisco ISL Inter Switch Link components?

Answer 19

Additional 26 bytes
Frame
Additional 4 bytes

Question 20

Additional 26 bytes contain?

Answer 20

Destination Address
Frame Type
User defined bits
Source address
Length
SNAP/LLC
VLAN ID
BPDU/CDP
Index

Question 21

IEEE 802.1Q Standard for Virtual Bridged Local Area Networks?

Answer 21

Preferred open source standard over proprietary Cisco

Frame tagging to identify the frames that belong to the VLANs

Question 22

IEEE 802.1Q Frame components?

Answer 22

Frame
Additional 4 Bytes
Frame

Question 23

IEEE 802.1Q Additional 4 bytes components?

Answer 23

2 bytes
Tag Protocol Identifier
2 bytes
Tag Control Identifier

Question 24

Tag Protocol Identifier?

Answer 24

Fixed value 0x8100 means that the frame carries 802.1Q

Question 25

Tag Control Identifier?

Answer 25

3 bits for priority levels
1 bit for bit order information
12 bits for VLAN ID