Networking Flashcards
What is a group of one or more LANs over a large geographic area?
WAN (Wide Area Network)
What is a smaller version of a WAN known as:
MAN (Metropolitan Area Network)
What is a smaller computer network used for communication by smartphones, PDAs and other small computing devices?
PAN (Personal Area Network)
What is the original connecting device for computers on the LAN that creates a simple shared physical plant that all computers use to send data?
Hub
What is a central connecting device that all computers connect to but takes the signal and sends it to the correct computers by identifying their MAC addresses instead of broadcasting it out to every port?
Switch
What enables data communications over the air if your computer is equipped with a wireless networking adapter?
Wireless access point (WAP)
What is a device that can either connect two LANs together or separate them into two sections?
Bridge
What is a device that contains multiple hard drives that connects directly to the network?
Network Attached Storage (NAS)
They offer high speed and have no operating system.
What is a device that allows a computer access to the Internet by changing the digital signals of the computer to analog signals used by a typical land-based phone line?
Modem
What is any device that enables easy connectivity to the Internet called?
Internet Appliance
What is used to connect two or more networks together to form an inter-network?
Router
What is any hardware appliance or software application that protects a computer from unwanted intrusion?
Firewall
What is a collection of technologies, devices, and protocols that allow voice communication over IP based networks?
Voice over Internet Protocol (VoIP)
What is a group of computers and other devices that are usually located in a small area?
LAN (Local Area Network)
What is the most common computer topology?
Star topology
What type of topology uses a central connecting device (such as a switch) to unite all of the computers on the LAN?
Star
What type of topology uses a backbone cable that all computers are connected to?
Bus
What type of topology has no central connecting device and is essentially a ring of computers formed together?
Ring
What type of topology has every device connected to every other device?
Mesh
What type of topology connects two different topologies together?
Hybrid
Example: A Star-Bus topology
Which of the following is a group of computers located in a small area?
A. LAN
B. WAN
C. PAN
D. MAN
A. LAN
Which of the following are most often used to connect a group of computers in a LAN? (Select the two best answers.)
A. Hub
B. Switch
C. Bridge
D. WAP
B and D.
What device contains multiple hard drives and is connected directly to the network?
A. Internet Appliance
B. Router
C. NAS
D. Firewall
C. NAS
Which of the following allows voice communication over IP-based networks?
A. Firewall
B. Modem
C. NAS
D. VoIP
D. VoIP
What network topology is the most common?
A. Ring
B. Star
C. Bus
D. Mesh
B. Star
What network topology combines the characteristics of two other topologies?
A. Hybrid
B. Star
C. Bus
D. Mesh
A. Hybrid
Which of the following network devices moves frames of data between a source and destination based on their MAC addresses?
A. Hub
B. Switch
C. Router
D. Modem
B. Switch
What is the most common type of cable used in today’s networks?
Twisted pair
It is called a twisted pair because the copper wires inside of the cable are twisted together into pairs throughout the entire length of the cable.
What does UTP stand for?
Unshielded twisted pair
What are the two most frequently used twisted pair types?
Category 5e and Category 6
The various speeds for the different UTP categories are:
Category 3: 10 Mbps
Category 5: 100 Mbps
Category 5e: 100 Mbps and gigabit networks
Category 6: 100 Mbps and gigabit networks
Wiring standards are based on what standard?
BOGB (Blue, Orange, Green, Brown)
568A and 568B are based on this.
The most common standard is 568B.
If a computer cannot connect to the network:
Check the network cable first. Make sure the RJ45 plug has a solid connection.
What is the difference between RJ45 plug and RJ11 plug?
RJ45 is larger and contains eight wires and connect to network adapters and network switches.
RJ11 contains six wires and is used to connect telephones.
What is a standard twisted-pair patch cable that you would use to connect a computer to a switch or RJ-45 jack is wired for 568B on each end called?
Straight through cable
What type of cable connects a computer directly to another computer?
Crossover cable
This type of cable is wired for 568B on one end and 568A on the other.
To meet fire code, what type of cable would be installed above drop ceilings and anywhere else necessary?
Plenum rated cable
What does STP stand for?
Shielded twisted pair.
This includes metal shielding over each pair of wires, reducing external EMI and the possibility of unauthorized network access.
STP cable is resistant to EMI.
What type of cable has a single conductor surrounded by insulating material which is then surrounded by a copper screen and finally an outer plastic sheath that is used to transfer data over a network?
Coaxial cable
What type of connectors are used on coaxial cables?
RG-6. These connectors are known as F connectors
What type of cable transmits data by way of light instead of electricity and can send signals much faster and further than copper wires?
Fiber Optic cable
It is capable of supporting 1000 Mbps and 10 Gbps networks
What are the type of connectors used with fiber optic cables?
ST, SC, and LC
What is the difference between multimode cables in single node cables?
Multimode cables have a larger core diameter than single mode cables. The smaller 50 micron version can handle three times the bandwidth and supports longer cable runs than the 62.5 micron version. It transmits day approximately 600 meters.
Single core on the other hand is only 8 to 10 microns and is used for longer distance runs perhaps from one city to the next, in the thousands of kilometers. At shorter distances, single mode cable can go beyond 10 Gbps.
Tools needed for cabling are:
Cable cutter
Wire stripper
Punch down tool: Punches down the wires into he RJ45 jack
Cable testers: Continuity tester
Tone and probe kit
RJ45 crimper
Patch tester
Loopback plug: This simulates a network and tests if the network adapter and TCP/IP are functioning properly.
Time-domain reflectomer (TDR): This locates faults in a cable or discontinuities in a connector.
Which of the following would be suitable for 1000 Mbps networks?(Select all that apply.)
A. Category 3
B. Category 5
C. Category 5e
D. Category 6
C and D.
What type of cable would you use if you were concerned about EMI?
A. Plenum-rated
B. UTP
C. STP
D. Coaxial
C. STP
Which type of cable can connect a computer to another computer directly?
A. Straight through
B. Crossover
C. Rolled
D. 568B
B. Crossover
Which of the following cables has a core diameter of 62.5 microns?
A. Single-mode
B. Category 6
C. Multimode
D. STP
C. Multimode
Which connector would you use for cable Internet?
A. LC
B. F-connector
C. BNC
D. RJ45
B. F-connector
Which tool would you use to test a network adapter not connected to the network?
A. Punch down tool
B. Cable tester
C. Loopback plug
D. Tone and probe
C. Loopback plug
How do you configure IPv4 in Windows 7/Vista and XP?
Windows 7/Vista: Start > Control Panel > Network and Internet > Network and Sharing Center. Select Change Adapter Settings. (In Vista, Manage My Network Connections). Right click the Local Area Connection and select Properties. Highlight Internet Protocol Version 4 and click Properties.
XP: Start > Control Panel > Network and Internet Connections. Select Network Connections. Right click the Local Area Connection and select Properties. Highlight Internet Protocol and click Properties.
What is the unique assigned number of your computer on the network?
IP address
IP addresses consist of four octets.
Each octet’s value can be between 0 and 255. Each number is separated by a dot.
Example: 192.168.0.100
Each octet contains 8 bits, so an IP address is a 32 bit number.
What is the difference between dynamic and static addressees?
Dynamic assigned addresses are more common for a client computer. The computer seats out a DHCP server so that it can get its IP info automatically.
Static addresses are when we configure the IP info manually.
What is a computer self assigned IP address?
APIPA (automatic private IP addressing)
If APIPA self assigns an address, it will be on the 169.254.0.0 network.
IP addresses are divided into two sections:
Network portion: the number of the network the computer is on.
Host portion: The individual number of the computer.
What defines which portion of the IP address is the network number and which portion is the individual host number?
Subnet mask
Example:
255.255.255.0
What is the IP address of the host that enables access to the Internet or to other networks called?
Gateway address
To use the gate gateway, computers must be on the same network number as the gateway device.
What is the IP address of the host that takes care of domain name translation to IP?
DNS server address
What are the different IP classes?
Class A: 1 - 126 Range, 126 networks, 16,777,214 hosts per network, used by Large Corps and ISPs
Class B: 128-191 Range, 16,384 networks, 65,534 hosts per network, used by Corps and Universities
Class C: 192-223 Range, 2,097,152 networks, 254 hosts per network, used by small offices/home offices (SOHO)
What is the IP address of the host that takes care of domain name translation to IP?
DNS server address
What are the different IP classes?
Class A: 1 - 126 Range, 126 networks, 16,777,214 hosts per network, used by Large Corps and ISPs
Class B: 128-191 Range, 16,384 networks, 65,534 hosts per network, used by Corps and Universities
Class C: 192-223 Range, 2,097,152 networks, 254 hosts per network, used by small offices/home offices (SOHO)
What are the default subnet masks for class A B and C?
A: 255.0.0.0
B. 255.255.0.0
C. 255.255.255.0
What is the difference between a private address and a public address?
A private address is one that is not display directly to the Internet and is normally behind a firewall.
Public addresses are displayed directly to the Internet, they are addresses that anyone could possibly connect to around the world.
What are the default subnet masks for class A B and C?
A: 255.0.0.0
B. 255.255.0.0
C. 255.255.255.0
What is the difference between a private address and a public address?
A private address is one that is not display directly to the Internet and is normally behind a firewall.
Public addresses are displayed directly to the Internet, they are addresses that anyone could possibly connect to around the world.
What are the private IP ranges for class A, B, and C?
A: 10.0.0.0 - 10.255.255.255
B: 172.16.0.0 - 172.31.255.255
C. 192.168.0.0 - 192.168.255.255