Chapters 10-12 Flashcards
Exam Question 124 (p.265):
What does ISP stand for?
internet service provider
Exam Question 125 (p.265):
What is a typical broadband download speed (2011, Worldwide)?
9 Mbps, meaning 9 megabits per second.
Exam Question 126 (p.265):
What is a typical broadband upload speed (2011, Worldwide)?
2.5 Mbps, meaning 2.5 megabits per second.
Exam Question 127 (p.265):
What is bandwidth?
Bandwidth measures how many bits per second can be transmitted.
Bandwidth is important to downloading les and viewing web pages.
Exam Question 128 (p.265):
What is throughput?
Throughput measures how many bits per second can be transmitted.
Bandwidth and throughput mean the same thing.
Exam Question 129 (p.265):
What are the two measures of network speed?
bandwidth, latency
Exam Question 130 (p.265):
What are the three measures of network speed?
download bandwidth, upload bandwidth, and latency
Exam Question 131 (p.265):
What is latency?
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.
Exam Question 132 (p.265):
What does demarc stand for?
demarcation
Exam Question 133 (p.265):
Why is the demarc important?
The ISP is responsible for everything outside the demarc. You are re-
sponsible for everything inside the demarc.
Exam Question 134 (p.265):
What does modem stand for?
modulator demodulator
Exam Question 135 (p.265):
What does WAN stand for?
wide area network
Exam Question 136 (p.265):
What does a modem do?
It converts between voltages and frequencies.
Exam Question 137 (p.265):
What does UTP stand for?
unshielded twisted pair
Exam Question 138 (p.265):
What does UTP do?
It is a physical cable for carrying bits between devices within a local area
network.
Exam Question 139 (p.265):
What does Cat 5 stand for?
category five
Exam Question 140 (p.265):
Which is better quality, cat5 or cat6?
cat6
Exam Question 141 (p.265):
What is troubleshooting?
When you have trouble, you try to gure out what the cause is and how
to x it.
Exam Question 142 (p.265):
What two times should you connect your computer directly to a modem?
(a) when it is the only computer on your home network. (b) when you
are troubleshooting the network.
Exam Question 143 (p.265):
What ve services does a typical home router provide?
rewall, gateway, DHCP, NAT, Wi-Fi
Exam Question 144 (p.265):
What does a rewall do?
It stops uninvited packets from reaching your computer.
Exam Question 145 (p.266):
What does a gateway do?
It provides a path from your computer to the Internet.
Exam Question 146 (p.266):
What does DHCP do?
It provides network conguration information to your computer when
you connect to the network.
Exam Question 147 (p.266):
What does NAT do?
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.
Exam Question 148 (p.266):
What does Wi-Fi do?
It provides wireless connections between laptops and the local area net-
work.
Exam Question 149 (p.266):
What does WAP stand for?
wireless access point
Exam Question 150 (p.266):
What does WLAN stand for?
wireless local area network
Exam Question 151 (p.266):
How fast is Wi-Fi?
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.
Exam Question 152 (p.266):
How many connections can a Wi-Fi access point handle?
hundreds
Exam Question 153 (p.266):
How fast is a wired connection?
100 or 1000 Mbps in each direction per connection is common.
Exam Question 154 (p.266):
What is duplex?
Duplex tells whether you have two paths, in and out, that can operate
at the same time.
Exam Question 155 (p.266):
What is half duplex?
You can send and receive, but not both at the same time. Wi-Fi is typically half duplex.
Exam Question 156 (p.266):
What is full duplex?
You can send and receive, both at the same time. Wired connections are
typically full duplex.
Exam Question 157 (p.266):
What benet does a switch provide?
It provides more wired ports for your LAN.
Exam Question 158 (p.266):
Name ve components of a typical home Internet system.
ISP, modem, router, WAP, computers.
Exam Question 159 (p.266):
Name ve categories of ISP.
cable, telephone (DSL), wireless, satellite, power line.
Exam Question 160 (p.266):
What does UPS stand for?
uninterruptible power supply
Exam Question 161 (p.266):
What is a hotspot?
Also called a Wi-Fi hotspot, it is another name for Wireless Access Point.
Exam Question 162 (p.266):
What does default mean?
Default is the choice or action that will happen if you do not specify
something else.
Exam Question 163 (p.266):
What defaults should I not keep?
passwords
Exam Question 164 (p.266):
What passwords does a home router normally have?
An administrative password and a Wi-Fi password.
Exam Question 165 (p.267):
What is a Global Broadcast Ping?
It is a ping to every device that you can reach.
Exam Question 166 (p.267):
What is the command to do a Global Broadcast Ping?
ping 255.255.255.255
Exam Question 167 (p.267):
With Global Broadcast Ping, who is the rst responder?
Normally the device sending the ping is also the rst to respond.
Exam Question 168 (p.267):
With Global Broadcast Ping, who is the second responder?
Normally the router (gateway) connecting you to the rest of the Internet
is the second device to respond.
