1.3 Networks Final Flashcards
compooter scince
What is a WAN?
A WAN connects two or more networks located over a large geographical area.
How many LANs do you need to make a WAN?
2 or more.
What is an IP address?
The address of the device on a network.
What does a router do?
It sends data out of the network.
What is a Packet?
A chunk of information with an IP address.
What does PAN stand for?
Personal Area Network.
What is a LAN?
A LAN is a network of devices located in a small geographical area, i.e., small office building or a family home.
What is the top sped of a coaxial cable?
10mbps per second.
What is another name for a twisted pair cable?
Ethernet cable.
Is fibre optic cable expensive?
it is the most expensive we have been taught about
perchance
Are fibre optics used in long distances or short distances?
Long distances.
What are fibre optic cables made of?
Glass core - or in cheaper lower grade ones, plastic.
What is the average maximum speed of a fibre optic cable?
10 gigabits (10000 megabits).
What is a router?
Connects together different networks and forwards data packets along a network.
What is the best cable for short distances?
Ethernet.
How fast can coaxial cables transfer data?
10 mbps - 100mbps.
How many gigabyets=10 guigabytes are fibre optic cables?
10 gigabytes.
How many megabytes are in a gigabyte?
1000.
What is latency?
How much lag/delay there is.
What does a switch do?
Sends data between devices in the network.
What is external hosting?
When a site is run on a server managed and owned by another company, for storage.
What is bandwidth?
The number of users that can use the network.
What is an advantage of a peer-to-peer network?
Easier to set up and manage than a client-server.
What is an advantage of local hosting?
You have more control over it.
Which network (client or peer-to-peer) is cheaper?
Peer to peer.
Does a peer-to-peer network have a server?
No.
What is an advantage of a client-server network?
Private.
Which network topology has a central hub?
Star.
What are some disadvantages of a peer-to-peer network?
- No centralized storage.
- Each computer has to be individually set up.
- No central user authentication or access rights.
Name one advantage of a star network topology.
It is easy to add new nodes.
What is the main role of the switch?
Connects devices on a LAN together.
What is the function of a TCP/IP?
It is used when we are sending and receiving data over a network.
Why is a star network called a star network?
It’s shaped like a star.
What is the function of a POP?
Used to send and receive emails and can only handle one letterbox.
What is topology?
The layout of a network.
What are the differences between IPv4, IPv6, and MAC?
IPv4 = 32 Bits, IPv6 = 128 Bits, MAC = Hexadecimal.
What is the center of a star topology?
A switch.
What is a flaw of star topology?
If the switch fails then all the devices connected will have no network connection.
What does TCP stand for?
Transmission Control Protocol.
What does POP stand for?
Post Office Protocol.
What does HTTP/S stand for?
Hypertext Transfer Protocol Secure.
List two different network topologies and an advantage for each.
Star can add nodes easily; Mesh, if one node fails the network still functions.
What is a disadvantage of a mesh network?
The complexity increases as the size of the network increases.
What does SMTP stand for?
Simple Mail Transfer Protocol.
What is external hosting?
External hosting is if you pay someone to host your server.
What does IMAP stand for?
Internet Message Access Protocol.
Why is fibre optic good?
It is very fast.
What is the purpose of a variable?
It holds one or more values.
What is a disadvantage of a star network topology?
If the central hub fails then the whole network will go down.
What is the function of a SMTP?
Sends and receives emails, push emails from one server to another.
What does FTP stand for?
File Transfer Protocol.
What is an advantage of a mesh network?
It is a reliable and robust network because if one node goes down, all the rest can carry on.
What does ISP stand for?
Internet Service Provider.
What are the differences between a static and dynamic IP?
Static = IP Does Not Change; Dynamic = Changes IP.
What is TCP/IP?
Transmission Control Protocol / Internet Protocol.
What is an advantage of a star network?
Add nodes easily because you only need one connection.
What are the 4 layers?
Application, Link, Transport, Network.
What are network protocols?
A set of rules for how devices communicate over a network.
What is a node?
A device.
What is the function of a FTP?
Where you transfer files between client and server.
What are fibre optic cables made out of?
Glass.
What is a LAN?
Local Area Network.
Why are fibre-optic cables made of glass?
So light can travel through the wire easily.
What is latency?
How much time it takes for a packet to travel across the network.
What is POP used for?
Receive emails from one remote server, only handle one mailbox.
How fast is a fibre optic cable?
10Gbps.
Why are fiber optic cables so fast?
Because they are made of light, and can travel at the speed of light.
What is a WAN?
Wide Area Network.
What is iteration?
Iteration is the repetition of a process.
What is an advantage of local hosting?
Easy to access.
What does an IPv4 address look like?
Dotted quad or dotted decimal.
How many bits is an IPv4 address?
32 bits, 4 bytes.
What does an IPv6 address look like?
A set of 16-bit hexadecimals separated by colons.
How many bits is an IPv6 address?
128 bits, 16 bytes.
What does a MAC address look like?
00-B0-D0-63-C2-26.
How many bits is a MAC address?
48 bits, 6 bytes.
What is the first step when resolving a domain with a DNS?
requesting website information
Why do we use network layers?
handles the routing and sending of data between different networks
What is a NIC?
Network Interface Card.
What does IP stand for?
Internet Protocol.
What does HTTP/S stand for?
HyperText Transfer Protocol / Secure.
What is the main function of a switch?
To connect devices together.
What is transmission media?
It is the way you choose to send your data.
What is bandwidth?
How much data can pass each other.
What is a link layer?
The link layer is the lowest layer. This is where packets physically get passed from one device to another, using MAC addresses.
What is an advantage of client servers?
What is a disadvantage of client servers?
Needs specialists to set up (additional costs).
What is an example of IPv4?
192.168.0.254 (32 bytes).
What is an example of IPv6?
2001:db8:3333:4444:CCCC:DDDD:EEEE:FFFF (128 bytes).
What is the purpose of TCP?
Used to send data and receive data over a network.
What is HTTP?
Hypertext Transfer Protocol: Set of rules used for sending and receiving web pages.
What is asymmetric encryption?
The public key is used to encrypt messages, but it can’t be used to decrypt them. So it’s safe to send across the internet to anyone. To decrypt a message encoded with the public key, you need to have the second, private key. This is never sent across a network, so it remains secret and safe.
