Chapter 5

Question 1

Because these devices connect network entities, they’re known as. p117

Answer 1

connectivity devices

Question 2

What are some of the common network connectivity devices.p117

Answer 2

Hub
Network Interface Card (NIC)
Bridge
Basic switch
Basic router
Basic firewall
Dynamic Host Configuration Protocol (DHCP) server
Other specialized devices

Question 3

what is a Hub. p118

Answer 3

Is the device that connects all the segments of the network together in a star topology Ethernet network.

Question 4

is installed in your computer to connect, or interface, your computer to the network. It provides the physical, electrical, and electronic connections to the network media. p118

Answer 4

Network Interface Card (NIC)

Question 5

what is a Bridge. p120

Answer 5

Is a network device that connects two similar network segments together. Its primary function is to keep traffic separated on either side of the bridge, breaking up collision domains

Question 6

what is a Switch p120

Answer 6

Switches connect multiple segments of a network together much like hubs do, but with three significant differences—a switch recognizes frames and pays attention to the source and destination MAC address of the incoming frame as well as the port on which it was received.

Question 7

is a network device used to connect many, sometimes disparate, network segments together, combining them into what we call an internetwork. p121

Answer 7

Router

Question 8

what is a Firewall. p125

Answer 8

A firewall protects your LAN resources from invaders that prowl the Internet for unprotected networks, while simultaneously preventing all or some of your LAN’s computers from accessing certain services on the Internet.

Question 9

what is (DHCP)p126

Answer 9

This protocol gives us a much easier way to administrate by automatically providing IP information
than the alternative and tedious method known as static IP addressing, where we have to address each host manually.

Question 10

Other Specialized Devices are what.p129

Answer 10

Multilayer switch
Load balancer
DNS server
Proxy server
Content filter
Encryption devices
VPN concentrator

Question 11

a computer networking device that switches on Open Systems Interconnection (OSI) Layer 2 like an ordinary network switch but provides extra functions on higher OSI layers, like Layer 3, for routing. p130

Answer 11

multilayer switch (MLS)

Question 12

follow various rules to determine specifically how they will route network traffic. Depending on your needs, you can set rules based on the least load, fault tolerance, the fastest response times, or just dividing up (balancing) outbound requests for smooth network operations. p130

Answer 12

Load Balancer

Question 13

what is a (DNS) Domain name service p130

Answer 13

One of the most important servers in your network and on the Internet as well. Why? Because without a DNS server, you would have to type http://206.123.114.186 instead of simply entering www.lammle.com.

Question 14

basically a type of server that handles its client-machine requests by forwarding them on to other servers while allowing granular control over the traffic between the local LAN and the Internet. p135

Answer 14

Proxy Server

Question 15

There are two main types of proxy servers you’ll typically find working in present-day networks: p135

Answer 15

Caching proxy server

Web proxy server

Question 16

what are some of the things that commonly cause LAN traffic congestion: 138

Answer 16

Too many hosts in a broadcast domain
Broadcast storms
Multicasting
Low bandwidth
Adding hubs for connectivity to the network

Question 17

__________ is the time measured from when a frame enters a port to the time it exits a port. p144

Answer 17

Latency

Question 18

______ can run up to gigabit speeds with very low latency rates.p144

Answer 18

application-specific integrated circuit (ASIC)

Question 19

If the destination is on a different segment, the frame can be transmitted only to that segment. This is called. p145

Answer 19

transparent bridging

Question 20

The term________ was introduced before routers and hubs were implemented, so it’s pretty common to hear people referring to bridges as switches. p140

Answer 20

bridging

Question 21

routers use a ________to make path selections and to forward packets to remote networks. p140

Answer 21

routing table

Question 22

Unlike Layer 2 switches, which forward or filter frames, routers (Layer 3 switches) use logical addressing and provide what is called p140

Answer 22

packet switching

Question 23

Routers can also provide packet filtering by using access lists; and when routers connect two or more networks together and use logical addressing (IP or IPv6), this is called an. p140

Answer 23

internetwork

Question 24

There are two advantages of using routers in your network: p139

Answer 24

They don’t forward broadcasts by default.

They can filter the network based on Layer 3 (Network layer) information (such as IP address).

Question 25

what is a VPN Concentrator

Answer 25

Is a device that accepts multiple VPN connections from remote location.

Question 26

The process of finding the IP address for any given host name is known as what. p131

Answer 26

Name Resolution

Question 27

(WINS) stands for what. p131

Answer 27

Windows Internet Naming Service

Question 28

A host name is typically the name of a device that has a specific IP address on the Internet it is part of what is known as a what. p131

Answer 28

Fully qualified domain name (FQDN)

Question 29

Other typical records found on DNS servers are _______ which are used to translate mail records. p133

Answer 29

mail exchanger records (MX)