Network Devices 2.2 - PM

Question 1

What does a router do?

Answer 1

forwards traffic between different IP subnets (based on IP)

Question 2

Can a router as a single device connect different network types?

Answer 2

Yes, such as WAN, LAN, copper and fiber

Question 3

What’s the difference between a router and a switch in how they forward data?

Answer 3

A router looks at the destination IP address to forward traffic
A switch looks at the destination MAC address

Question 4

What’s the difference between unmanaged and managed switches?

Answer 4

An unmanaged switch has no configuration options, no protocols available

A managed switch allows configuration (like VLANS), port mirroring, external management (SNMP), etc used for large orgs

Question 5

What’s the difference between an access point and a wireless router?

Answer 5

An access point only provides a link between a wired network and a wireless network (a bridge)

Question 6

Cable runs from a desk area are punched down permanently to what part of the patch panel?

Answer 6

the back

Question 7

What side are the RJ-45 connectors on the patch panel located?

Answer 7

RJ-45 connectors in the front, connections are then made to switches

Question 8

What does a firewall do?

Answer 8

It allows/disallows traffic based on IP address and port numbers

Question 9

What OSI layer is a firewall (standalone)?

Answer 9

OSI layer 4 because it filters traffic by port number

[Transport Layer]

Question 10

How can a firewall also function as a layer 3 device?

Answer 10

it can be integrated into SOHO routers

[Network layer]

Question 11

A firewall that can understand application layer traffic are called what?

Answer 11

Layer 7 devices

[Application Layer]

Question 12

What are PoE injectors? What are they also called?

Answer 12

Also called midspans, they’re placed in the middle between a switch and device connection to provide power to the ethernet cable (PoE)

Question 13

What are PoE endspans?

Answer 13

Built-in power is provided by the switch (Power over Ethernet)

[doesn’t need middleman]

Question 14

How does a switch tell you which interfaces support PoE?

Answer 14

The blue line across the top of the ports (supports PoE)

Question 15

What types of traffic are being communicated over a single cable in broadband communication?

Answer 15

video signals, phone lines, Internet are communicated in broadband communication and then devices can connect to the cable modem to access that data

Question 16

What is the standard for sending data over cable? What does it stand for?

Answer 16

DOCSIS

Data over Cable Service Interface Specification

Question 17

Cable modems support up to what speeds?

Answer 17

1 Gbps

Question 18

What does ADSL stand for?

Answer 18

Asymmetrical Digital Subscriber Line

Question 19

What makes a connection asymmetrical?

Answer 19

The download speed is much faster than the upload

Question 20

What’s the distance limitation for DSL before the signal gets too weak to receive data?

Answer 20

10,000 feet from the central office

Question 21

What is the delivery method for fiber networks?

Answer 21

They use an ONT - optical network terminal that converts fiber network to home network (like copper cable network)

(fiber to the premises)

Question 22

What does NIC stand for?

Answer 22

Network Interface card

Question 23

What types of NICs are available?

Answer 23

different ones for different network types (Ethernet, WAN, wireless, etc)

Question 24

Every device on a network has a ____ in order to connect to it

Answer 24

NIC

Question 25

Does a fiber network need a NIC?

Answer 25

yes, just like copper