L3 IT Hardware Networks

Question 1

Bits & Bytes

Answer 1

8 bits = 1 byte
1 bit has two values - either 1 or 0
2^n n=no. of bits

Question 2

Network DEF

Answer 2

method of electronically connecting devices to communicate info

Question 3

bus topology (old). - not explaining
star topology (current)

Answer 3

computers connected by cable segments to a CENTRE POINT.
centre goes down = whole network down
computer down = network still functions

Question 4

Backbone

Answer 4

*each computer has at least 100bit dedicated connection back to the switch
*switch in hospital network is connected by at least a gigabit fiberoptic to the fiberoptic backbone

Question 5

hardware

Answer 5

hubs & switches
bridge
router
firewall
virtual private network

Question 6

switches + star topology (efficient)

Answer 6

switch makes independent links based on target address ,each port controlled separately ,hub/centre points cannot do this

Question 7

NIC - network interface controller

Answer 7

Enables computer to communicate on a network. Each one has unique 48 bit serial number called a MAC address.

Question 8

BRIDGE def

Answer 8

A product that connects a local area network to another that uses the same protocol

Question 9

REPEATER def

Answer 9

Device, receive signal, amplifies it and send it on.
Extends range of connection past the maximum limit, analog and digital systems

Question 10

ROUTER ?

Answer 10

connected to 2 or more networks undecided which way to send each info packet. Can convert between different protocols, they isolate all unnecessary traffic from the two networks.

Question 11

FIREWALL

Answer 11

Protects private networks, auntie hacking, antivirus, network address transmission

Question 12

VPN

Answer 12

Virtual private network
Encrypted connection, allows you to connect remotely as if you were connected directly at the site

Question 13

Network Groupings

Answer 13

LAN local area network, WAN wide area network, MAN multiple area network, GAN area network

Question 14

bits & bytes

Answer 14

A bit is the smallest component of information, it’s a binary digit, it has two states either on or off, one or zero.
Bite equals eight bits, nibble equals four bits
1024!

Question 15

IP address

Answer 15

An IP address contains an area code and the node at the end is a set of numbers that differentiates different devices. This is called the telephone number.

Question 16

ENDIANNESS

Answer 16

describing the memory order,
big endian equals big end first
Little endian equals little and first

Question 17

subnet

Answer 17

He subnet is each logical group of computers in a hospital such as A&E x-ray haematology, they use similar IP addresses to differentiate from other computers on the network