E3 Flashcards
ISP
internet service provider
What is a typical broadband download speed in megabits per second (2013, Worldwide)?
15
What is a typical broadband upload speed in megabits per second (2013, Worldwide)?
5
What is bandwidth?
bits transmitted per second
What is throughput?
bits transmitted per second
List the two measures of network speed.
bandwidth, latency
List the three measures of network speed.
upload bandwidth, download bandwidth, latency
What is latency?
Latency is the delay between a packet being sent and being received.
What does demarc stand for?
demarcation
Why is the demarc important?
The ISP is responsible for everything outside the demarc. You are responsible for everything inside the demarc.
What does modem stand for?
modulator demodulator
What does a modem do?
convert between voltages and frequencies
What does 8P8C stand for?
eight position eight contact
In RJ45, what does RJ stand for?
registered jack
What is the technical term for a connection that can use either straight-through or crossover cables?
auto-mdix
What does UTP stand for?
unshielded twisted pair
What does UTP do?
It is a physical cable for carrying bits between devices within a local area network.
What does Cat 5 stand for?
category five
Which is better quality, cat5 or cat6?
cat6
What is troubleshooting?
When you have trouble, you try to figure out what the cause is and how to fix it.
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.
List the five services a typical home router provides.
firewall, gateway, dhcp, nat, wifi
What does a firewall do?
It stops uninvited packets from reaching your computer.
What does a gateway do?
It provides a path from your computer to the Internet.
What does DHCP do?
It provides network configuration information to your computer when you connect to the network.
What does NAT do?
replace one IP address with another
What does Wi-Fi do?
provide a wireless connection between a device and an access point
What does WAP stand for?
wireless access point
What does WLAN stand for?
wireless local area network
How fast is Wi-Fi in Mb/s?
600
How many connections can a Wi-Fi access point handle?
20+
How fast (in Mb/s) is a wired connection?
100 is common
What is half duplex?
You can send and receive, but not both at the same time.
What is full duplex?
You can send and receive, both at the same time.
What benefits does a switch provide?
(a) more wired ports. (b) full-duplex communication.
Name five components of a typical home Internet system.
SP, modem, router, WAP, computers.
Name five categories of ISP.
cable, dsl (telephone), wireless, satellite, power line
What does UPS stand for?
uninterruptible power supply
What is a hotspot?
Also called a Wi-Fi hotspot, it is another name for Wireless Access Point.
What does default mean?
Default is the choice or action that will happen if you do not specify something else.
What defaults should I not keep?
passwords
What two passwords does a home router normally have?
administrative and Wi-Fi
What is the maximum length (in meters) for Cat5 cabling?
100
With T568 wiring, are the striped wires odd or even?
odd
With T568 wiring, are the solid-color wires odd or even?
even
With T568A wiring, what color goes in slots 1 and 2?
green
With T568B wiring, what color goes in slots 1 and 2?
orange
With T568A wiring, what color goes in slots 3 and 6?
orange
With T568B wiring, what color goes in slots 3 and 6?
green
With T568A wiring, what color goes in slots 4 and 5?
blue
With T568B wiring, what color goes in slots 4 and 5?
blue
With T568A wiring, what color goes in slots 7 and 8?
brown
With T568B wiring, what color goes in slots 7 and 8?
brown
What is a Global Broadcast Ping?
It is a ping to every device that you can reach.
What is the command to do a Global Broadcast Ping?
ping 255.255.255.255
With Global Broadcast Ping, who is the first responder?
The device sending the ping is normally the first to respond.
With Global Broadcast Ping, who is the second responder?
The router (gateway) connecting you to the rest of the Internet is normally the second device to respond.
