Chapters 10-12

Question 1

Exam Question 124 (p.265):

What does ISP stand for?

Answer 1

internet service provider

Question 2

Exam Question 125 (p.265):

What is a typical broadband download speed (2011, Worldwide)?

Answer 2

9 Mbps, meaning 9 megabits per second.

Question 3

Exam Question 126 (p.265):

What is a typical broadband upload speed (2011, Worldwide)?

Answer 3

2.5 Mbps, meaning 2.5 megabits per second.

Question 4

Exam Question 127 (p.265):

What is bandwidth?

Answer 4

Bandwidth measures how many bits per second can be transmitted.
Bandwidth is important to downloading les and viewing web pages.

Question 5

Exam Question 128 (p.265):

What is throughput?

Answer 5

Throughput measures how many bits per second can be transmitted.
Bandwidth and throughput mean the same thing.

Question 6

Exam Question 129 (p.265):

What are the two measures of network speed?

Answer 6

bandwidth, latency

Question 7

Exam Question 130 (p.265):

What are the three measures of network speed?

Answer 7

download bandwidth, upload bandwidth, and latency

Question 8

Exam Question 131 (p.265):

What is latency?

Answer 8

Latency is the delay between a packet being sent and being received.
Latency is also called ping or lag. Latency is important to gamers.
In the home market, typically an ISP is a cable TV company or a telephone
company. Satellite companies also provide Internet.

Question 9

Exam Question 132 (p.265):

What does demarc stand for?

Answer 9

demarcation

Question 10

Exam Question 133 (p.265):

Why is the demarc important?

Answer 10

The ISP is responsible for everything outside the demarc. You are re-
sponsible for everything inside the demarc.

Question 11

Exam Question 134 (p.265):

What does modem stand for?

Answer 11

modulator demodulator

Question 12

Exam Question 135 (p.265):

What does WAN stand for?

Answer 12

wide area network

Question 13

Exam Question 136 (p.265):

What does a modem do?

Answer 13

It converts between voltages and frequencies.

Question 14

Exam Question 137 (p.265):

What does UTP stand for?

Answer 14

unshielded twisted pair

Question 15

Exam Question 138 (p.265):

What does UTP do?

Answer 15

It is a physical cable for carrying bits between devices within a local area
network.

Question 16

Exam Question 139 (p.265):

What does Cat 5 stand for?

Answer 16

category five

Question 17

Exam Question 140 (p.265):

Which is better quality, cat5 or cat6?

Answer 17

cat6

Question 18

Exam Question 141 (p.265):

What is troubleshooting?

Answer 18

When you have trouble, you try to gure out what the cause is and how
to x it.

Question 19

Exam Question 142 (p.265):

What two times should you connect your computer directly to a modem?

Answer 19

(a) when it is the only computer on your home network. (b) when you
are troubleshooting the network.

Question 20

Exam Question 143 (p.265):

What ve services does a typical home router provide?

Answer 20

rewall, gateway, DHCP, NAT, Wi-Fi

Question 21

Exam Question 144 (p.265):

What does a rewall do?

Answer 21

It stops uninvited packets from reaching your computer.

Question 22

Exam Question 145 (p.266):

What does a gateway do?

Answer 22

It provides a path from your computer to the Internet.

Question 23

Exam Question 146 (p.266):

What does DHCP do?

Answer 23

It provides network conguration information to your computer when
you connect to the network.

Question 24

Exam Question 147 (p.266):

What does NAT do?

Answer 24

Normally it translates non-routable IP addresses into routable ones.
Actually NAT can translate any kind of IP address into any kind, but it is
most useful converting between routable and non-routable.

Question 25

Exam Question 148 (p.266): | What does Wi-Fi do?

Answer 25

It provides wireless connections between laptops and the local area net- work.

Question 26

Exam Question 149 (p.266): | What does WAP stand for?

Answer 26

wireless access point

Question 27

Exam Question 150 (p.266): | What does WLAN stand for?

Answer 27

wireless local area network

Question 28

Exam Question 151 (p.266): | How fast is Wi-Fi?

Answer 28

54 Mbps, shared, is common. Wi-Fi speeds max out at 11 Mbps for 802.11b, 54 Mbps for 802.11g, and 600 Mbps for 802.11n. That bandwidth is shared among all users.

Question 29

Exam Question 152 (p.266): | How many connections can a Wi-Fi access point handle?

Answer 29

hundreds

Question 30

Exam Question 153 (p.266): | How fast is a wired connection?

Answer 30

100 or 1000 Mbps in each direction per connection is common.

Question 31

Exam Question 154 (p.266): | What is duplex?

Answer 31

Duplex tells whether you have two paths, in and out, that can operate at the same time.

Question 32

Exam Question 155 (p.266): | What is half duplex?

Answer 32

You can send and receive, but not both at the same time. Wi-Fi is typically half duplex.

Question 33

Exam Question 156 (p.266): | What is full duplex?

Answer 33

You can send and receive, both at the same time. Wired connections are typically full duplex.

Question 34

Exam Question 157 (p.266): | What benet does a switch provide?

Answer 34

It provides more wired ports for your LAN.

Question 35

Exam Question 158 (p.266): | Name ve components of a typical home Internet system.

Answer 35

ISP, modem, router, WAP, computers.

Question 36

Exam Question 159 (p.266): | Name ve categories of ISP.

Answer 36

cable, telephone (DSL), wireless, satellite, power line.

Question 37

Exam Question 160 (p.266): | What does UPS stand for?

Answer 37

uninterruptible power supply

Question 38

Exam Question 161 (p.266): | What is a hotspot?

Answer 38

Also called a Wi-Fi hotspot, it is another name for Wireless Access Point.

Question 39

Exam Question 162 (p.266): | What does default mean?

Answer 39

Default is the choice or action that will happen if you do not specify something else.

Question 40

Exam Question 163 (p.266): | What defaults should I not keep?

Answer 40

passwords

Question 41

Exam Question 164 (p.266): | What passwords does a home router normally have?

Answer 41

An administrative password and a Wi-Fi password.

Question 42

Exam Question 165 (p.267): | What is a Global Broadcast Ping?

Answer 42

It is a ping to every device that you can reach.

Question 43

Exam Question 166 (p.267): | What is the command to do a Global Broadcast Ping?

Answer 43

ping 255.255.255.255

Question 44

Exam Question 167 (p.267): | With Global Broadcast Ping, who is the rst responder?

Answer 44

Normally the device sending the ping is also the rst to respond.

Question 45

Exam Question 168 (p.267): | With Global Broadcast Ping, who is the second responder?

Answer 45

Normally the router (gateway) connecting you to the rest of the Internet is the second device to respond.