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IT 280 OSI > deck_522470 > Flashcards

deck_522470 Flashcards

2
Q

Exam Question 124 (p.265):What does ISP stand for?

A

internet service provider

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3
Q

Exam Question 125 (p.265):What is a typical broadband download speed (2011, Worldwide)?

A

9 Mbps, meaning 9 megabits per second.

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4
Q

Exam Question 126 (p.265):What is a typical broadband upload speed (2011, Worldwide)?

A

2.5 Mbps, meaning 2.5 megabits per second.

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5
Q

Exam Question 127 (p.265):What is bandwidth?

A

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

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6
Q

Exam Question 128 (p.265):What is throughput?

A

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

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7
Q

Exam Question 129 (p.265):What are the two measures of network speed?

A

bandwidth, latency

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8
Q

Exam Question 130 (p.265):What are the three measures of network speed?

A

download bandwidth, upload bandwidth, and latency

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9
Q

Exam Question 131 (p.265):What is latency?

A

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 telephonecompany. Satellite companies also provide Internet.

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10
Q

Exam Question 132 (p.265):What does demarc stand for?

A

demarcation

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11
Q

Exam Question 133 (p.265):Why is the demarc important?

A

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

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12
Q

Exam Question 134 (p.265):What does modem stand for?

A

modulator demodulator

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13
Q

Exam Question 135 (p.265):What does WAN stand for?

A

wide area network

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14
Q

Exam Question 136 (p.265):What does a modem do?

A

It converts between voltages and frequencies.

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15
Q

Exam Question 137 (p.265):What does UTP stand for?

A

unshielded twisted pair

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16
Q

Exam Question 138 (p.265):What does UTP do?

A

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

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17
Q

Exam Question 139 (p.265):What does Cat 5 stand for?

A

category five

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18
Q

Exam Question 140 (p.265):Which is better quality, cat5 or cat6?

A

cat6

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19
Q

Exam Question 141 (p.265):What is troubleshooting?

A

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

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20
Q

Exam Question 142 (p.265):What two times should you connect your computer directly to a modem?

A

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

21
Q

Exam Question 143 (p.265):What ve services does a typical home router provide?

A

rewall, gateway, DHCP, NAT, Wi-Fi

22
Q

Exam Question 144 (p.265):What does a rewall do?

A

It stops uninvited packets from reaching your computer.

23
Q

Exam Question 145 (p.266):What does a gateway do?

A

It provides a path from your computer to the Internet.

24
Q

Exam Question 146 (p.266):What does DHCP do?

A

It provides network conguration information to your computer whenyou connect to the network.

25
Q

Exam Question 147 (p.266):What does NAT do?

A

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

26
Q

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

A

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

27
Q

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

A

wireless access point

28
Q

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

A

wireless local area network

29
Q

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

A

54 Mbps, shared, is common.Wi-Fi speeds max out at 11 Mbps for 802.11b, 54 Mbps for 802.11g, and600 Mbps for 802.11n. That bandwidth is shared among all users.

30
Q

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

31
Q

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

A

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

32
Q

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

A

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

33
Q

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

A

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

34
Q

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

A

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

35
Q

Exam Question 157 (p.266):What benet does a switch provide?

A

It provides more wired ports for your LAN.

36
Q

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

A

ISP, modem, router, WAP, computers.

37
Q

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

A

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

38
Q

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

A

uninterruptible power supply

39
Q

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

A

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

40
Q

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

A

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

41
Q

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

42
Q

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

A

An administrative password and a Wi-Fi password.

43
Q

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

A

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

44
Q

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

A

ping 255.255.255.255

45
Q

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

A

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

46
Q

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

A

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

IT 280 OSI (6 decks)

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