NET-09-P1 VLANs and Trunks

Question 1

is a common concept and practice among network administrators and is Layer 2 and allows virtual network segmentation, meaning dividing a physical network into separate logical networks

Answer 1

VLANs - Virtual Local Area Networks

Question 2

How do VLANs work?

Answer 2

• mutliple ports are configured on the switch and associated with a VLAN, creating a logical barrier between end devices connected to the switch
• This enables network administrators to create several VLANs on a single switch
• VLANs are logical

Question 3

Benefits of using VLANs

Answer 3

• improved security
• enhanced Performance
• Simplified Management

Question 4

A unique ID identifies a VLAN in the network

Answer 4

VLAN ID

Question 5

What is the range of a valid VLAN ID

Answer 5

1006 to 4094

Question 6

What are the VLAN Types

Answer 6

• Default VLAN = cannot be removed or renamed. VLANs 1 and 1002-1005 are reserved and added
• Data VLAN = main function is to tag data traffic with an identifier. VLANs 2-1001 are commonly used for data exchanges.
• Voice VLAN = designed for VolP (Voice over IP) network traffic
• Management VLAN = enable remote connection and conduct basic network functions
• Native VLAN = designed to forward untagged traffic such as DTP and CDP

Question 7

What is the command to show that the switch is already pre-configured with VLAN 1

Answer 7

show vlan brief

Question 8

Can carry traffic for different VLANs and devices

Answer 8

Switchport Modes: Trunk

Question 9

carry traffic only on the VLAN to which they belong

Answer 9

Switchport Modes: Access

Question 10

The assignment of hosts (end devices, such as PCs) to different VLANs is done by matching the interconnected interface to the appropriate VLAN

Answer 10

Switchport mode access

Switchport access vlan

Question 11

enables easier management of VolP over the network

Answer 11

Switchport voice vlan

Question 12

What is trunking?

Answer 12

Trunk mode is designed to transmit multiple VLAN traffic sessions, over the same physical connection, to a remote device, such as a switch or router

Question 13

The protocol adds VLAN information to Ethernet Frames

Answer 13

Inter-Switch Link

Question 14

is a protocol developed by Cisco to automate the creation of trunk links

Answer 14

DTP - Dynamic Trunk Protocol

Question 15

What drops untagged frames?

Answer 15

Trunk ports