Chapter one

Question 1

Server

Answer 1

Provides information such as emails and web pages to the other hosts on network

Question 2

Advantage of peer to peer network

Answer 2

Easy to set up Its cheaper Transfer files and share printers

Question 3

Disadvantage of peer to peer network

Answer 3

Not secure. Not scalable. The devices can act as server and client -slows performance No administration

Question 4

Role of client

Answer 4

A client is computor host which requests and displays the information from the server

Question 5

Define Fixed computing

Answer 5

You go to device

Question 6

Define Internet of things

Answer 6

Age of devices

Question 7

Define Internet of everything

Answer 7

People,data,things

Question 8

Define peer to peer network

Answer 8

2 directly connected computers use wired/ wireless connection

Question 9

Define Peer to peer file sharing

Answer 9

Share files with others without downloading or storing it from central server

Question 10

Define Hosts and hosts device

Answer 10

Hosts- can send or receive messages on network can connect to multiply servers same time. Host device - source or destination of message transmitted over network and connects one host to another and uses IP address decide message goes

Question 11

Define Network infrastructure and what they vary on

Answer 11

Supports the network and makes it stable Such as Devices ,media, servers. Network structures vary on size of area covered, no of users connected, and no and types of services available

Question 12

What does Intermediary devices do

Answer 12

Interconnect end devices provides connectivity allows data flow across network Regenerates & transmits data signals Maintains information+chooses pathway Informs other device for error and communication failure

Question 13

Eg of intermediary devices

Answer 13

Network access- switches, wireless Internet working- routers Security- firewall

Question 14

3 types media to interconnect devices

Answer 14

Copper Fibre optic cable - rely on infrared/visible e.g glass, plastic. Wireless transmission - electromagnetic waves

Question 15

Choose network depends on

Answer 15

Depends on environment if can be installed and distance can successfully carry signal

Question 16

Network interface card

Answer 16

NIC or LAN connects to network at PC or host device

Question 17

Physical port

Answer 17

Connector on network device so media is connected to host/ networking device

Question 18

Interface

Answer 18

Specialised port on internetworking device and connects individual networks ( port on router are network interface which interconnects devices )

Question 19

Define Physical topology

Answer 19

Identify the physical location of intermediary devices, configured parts, And cable installation

Question 20

Logical topology

Answer 20

Identify the IP addressing, ports, device

Question 21

Difference between LAN and WAN

Answer 21

LAN- connected by WAN and gives access to other users and end devices in small area such as schools , home WAN- wide area and gives access to other networks it is connected by service providers and Internet service providers

Question 22

Difference between WLAN And SAN

Answer 22

WLAN- Interconnects users and end points in small area SAN- supports file servers and give data storage, retrieved and replicate and uses high bandwidth and fibre channel

Question 23

Intranet and extranet

Answer 23

Intranet- private connection of LAN and WAN only organisation access it. Extranet- secure and safe access for individuals but require company data

Question 24

DSL

Answer 24

Separates the DSL signal from the telephone and give Ethernet connection to host computor/ LAN Always connected to Internet, uses special modem and high bandwidth Depend on quality phone line and distance from company office

Question 25

Dial up telephone

Answer 25

Uses any phone line and connects to ISP to access phone No . Uses any modem and its inexpensive low bandwidth and used for mobile travelling not for large data

Question 26

Satellite

Answer 26

No access to DSL or cellular

Question 27

Dedicated leased line

Answer 27

Connection service from service provider to customer premise and its reserved circuit which separate the office for private data and voice it's rented monthly cost

Question 28

Metro Ethernet

Answer 28

Gives customer over copper or fibre connection. fibre connection gives faster speed

Question 29

Fault tolerance

Answer 29

Limits impact failure so less are affected and quicker recovery if occurred has multiple pathways

Question 30

Scalability

Answer 30

Expand rapidly to support new users and application no affect on performance delivered such as WAN

Question 31

Redundant connection

Answer 31

Allow alternative routes for device or link fails

Question 32

Time sensitive communication and non time sensitive

Answer 32

Telephone or video disruption Non time sensitive - decreased priority for web pages or email

Question 33

High importance organisation and undesirable communication

Answer 33

Increased priority for business transaction data. Undesirable - decreased priority or block unwanted activity

Question 34

Network security and information security

Answer 34

Physical secure of device gives network connectivity and prevents unauthorised access to management software Information - protects information inside packets transmitted over network and information stored on network attached to device

Question 35

Ensuring confediently and ensuring availability

Answer 35

Only authorised people devices access data strong system Availability - reliable acces to data services for authorised users end antivirus

Question 36

Cloud computing

Answer 36

Allows you to store files and back up entire hard disk drive on servers and photo edit

Question 37

WISP

Answer 37

An ISP which connects subscribers to designated acces point or hot spot using similar technology found in WLAN it's found where DSL not available

Question 38

Powerline networking

Answer 38

Home networking uses electrical wiring and connects to LAN if WAP not available or cannot reach device it saves cost installing cables and electrical bills

Question 39

Virtualisation

Answer 39

Set of files and programmes running on physical system such as OS, storage device,hardware It reduces cost

Question 40

Maintaining communication integrity

Answer 40

Data cannot be changed from source to destination only if information is corrupted

Question 41

Data interception theft

Answer 41

Capture private information

Question 42

Identity theft

Answer 42

Steal login credits of user to access private information

Question 43

Example of intermediary devices

Answer 43

Wireless router , firewall appliance , router , LAN switch they only receive data

Question 44

End devices

Answer 44

IP phone, laptops , printer , computor and will generate and receive data

Question 45

Network architecture

Answer 45

Ensures connection of any device across network

Question 46

Converged network

Answer 46

How much data you can put in Ip phone, video , voice , data