Network+ Chapter 11

Question 1

What are 4 benefits of Layer 2 switching?

pg 339

Answer 1

Hardware-based bridging (ASIC)
Wire speed
Low latency
Low cost

Question 2

what are 3 functions of Layer 2 switches that you will need to remember?

pg 340

Answer 2

Address learning
Forward/ filter decisions
Loop avoidance

Question 3

Define Address Learning?

pg 341

Answer 3

Layer 2 Switches remember the source hardware address of each frame received on an interface and enter this information into a MAC database known as a forward/ filter table.

Question 4

Why is it good to have redundancy between switches?

pg 344

Answer 4

Having redundancy between switches can help prevent complete network failures if one should fail.

Question 5

What are the 5 methods the ports on a bridge or switch running STP can transition through?

pg 347

Answer 5

Blocking
Listening
Learning
Forwarding
Disabled

Question 6

Whare are the 5 QoS methods problems that can affect data as it traverses network cable:

pg 353

Answer 6

Delay 
Dropped packets 
Error 
Jitter 
Out-of-order  Delivery

Question 7

Why would you create a static VLAN?

pg 354

Answer 7

static VLANs are the most secure.

Question 8

Static access ports are either manually assigned to a VLAN or assigned through a________ server for use with ________.

pg 354

Answer 8

RADIUS

IEEE 802.1x

Question 9

What two speeds can a trunk link run at?

pg 356

Answer 9

100Mbps or 1000Mbps

Question 10

How many VLANs can be carried across traffic at once?

pg 356

Answer 10

1 to 4,094

Question 11

Describe VLAN Trunking Protocol (VTP)?

pg 359

Answer 11

Its to manage all configured VLANs across a switched internetwork and to maintain consistency throughout that network.

Question 12

What are 4 features that VTP has to offer?

pg 359

Answer 12

Consistent VLAN configuration across all switches in the network
Accurate tracking and monitoring of VLANs
Dynamic reporting of added VLANs to all switches in the VTP domain
Adding VLANs using plug-and-play

Question 13

What are 4 requirements for VTP to communicate VLAN information between switches:

pg 359-360

Answer 13

The VTP management domain name of both switches must be set the same.
One of the switches has to be configured as a VTP server.
Set a VTP password if used.
No router is necessary and a router is not a requirement.

Question 14

____________is a way of explicitly tagging VLAN information onto an Ethernet frame.

pg 357

Answer 14

Inter-Switch Link (ISL)

Question 15

What does it mean when you configure a switch out-of band?

Answer 15

you aren’t going through the network to configure the device. You are actually using a port to configure the switch instead.

Question 16

What kind of environment would you use a unmanaged switch in?

Answer 16

home network

Question 17

What is a unmanaged switch?

Answer 17

They are basic plug-and-play switches with no remote configuration, management, or monitoring options

Question 18

Define Dynamic ARP inspection (DAI)?

(p. 364)

Answer 18

Its a feature that uses the DHCP snooping database of IP address to MAC address mappings to verify the MAC address mappings of each frame going through the switch.

Question 19

Port Mirroring is also called what and what are their functions?

Pg 368

Answer 19

Switch Port Analyzer (SPAN) and Remote SPAN,

They allow you to sniff traffic switch on a network when using a switch.