2.2 Given a scenario, determine the appropriate placement of networking devices on a network and install/configure them.

Question 1

Hub

Answer 1

• “Multi-port repeater”
• OSI Layer 1
• Everything is half-duplex

Question 2

Bridge

Answer 2

• Imagine a switch with two to four ports
• Connects different physical networks
• OSI Layer 2 device
• Most bridges these days are wireless access points

Question 3

Switch

Answer 3

• Bridging done in hardware
• An OSI layer 2 device
• Forwards traffic based on data link address
• Many ports and features
• Multilayer switch

Question 4

Router

Answer 4

• Routes traffic between IP subnets
• OSI layer 3 device
• Often connects diverse network types
• LAN, WAN, copper, fiber

Question 5

Firewall

Answer 5

• Filters traffic by port number
• OSI layer 4 (TCP/UDP)
• Some firewalls can filter through OSI layer 7
• Can encrypt traffic into/out of the network
• Can proxy traffic
• Most firewalls can be layer 3 devices (routers)

Question 6

Wireless access point (WAP)

Answer 6

• Not a wireless router

* WAP is a bridge

Question 7

Converting media

Answer 7

• OSI Layer 1
• Extend a copper wire over a long distance
• You have fiber
• The switch only has copper ports
• Almost always powered

Question 8

Wireless range extender

Answer 8

• Wireless never seems to stretch far enough
• We can’t always choose where to install an access point

• Extend the reach of a wireless network

Question 9

VoIP endpoint

Answer 9

• Some people still communicate using voice

* The device can now be anything