Network

Question 1

Server

Answer 1

A software app that provides a service to other computer systems connected to the same network

Question 2

Client

Answer 2

A software app that requests a service from a server connected to the same network

Question 3

Hub

Answer 3

Connection point for devices on a single network(via Ethernet or wireless)

Question 4

Switch

Answer 4

Same thing as a hub but can identify which device is connected to which port

Question 5

Router

Answer 5

Used to join multiple networks and serve as an intermediary between networks

Question 6

Internet

Answer 6

A global WAN connecting millions of computer of computer systems (computer network can to the internet through an ISP)

Question 7

Internet of Things

Answer 7

Anything that can connect to the in internet(has an assigned IP address)

Question 8

Extranet

Answer 8

Computer network that uses the internet to allow controlled access by specific users to a specific LAN or WAN(require authorisation and anyone with the correct authorisation can connect)

Question 9

Intranet

Answer 9

A private network with internet with internet protected by a firewall(no one without registration of the network can’t access)

Question 10

P2P

Answer 10

Computers are clients and servers at the same time

Question 11

OSI: Application Layer

Answer 11

Provides abstraction functions for apps to use (Example: http, https, SMTP, POP3 etc.)

Question 12

OSI: Presentation Layer

Answer 12

Ensures the received data s in the correct format for the specific OS (Example: ASCII to UniCode, Big Endian Library, Little Endian Library)

Question 13

OSI: Session Layer

Answer 13

Sets up and manages sessions (‘conversations’) between network nodes/users

Question 14

OSI: Transport Layer

Answer 14

Breaks data into packets and handles their delivery and also performs error checking

Question 15

OSI: Network Layer

Answer 15

Handles addressing of network nodes/users(by IP) and the routing data between them

Question 16

OSI: Data Link Layer

Answer 16

Actually sends the packets between each node/user

Question 17

OSI: Physical Layer

Answer 17

Computer data is translated into physical signals (light pulse, electrical signals etc.). In other words, it is the actually physical connection between them

Question 18

Secure VPN

Answer 18

All traffic on the VPN must be encrypted, authenticated and then sent along virtual tunnels

Question 19

VPN Type: Internet Protocol Security (IPSec)

Answer 19

NAME?

Question 20

VPN Type: Secure Socket Layer (SSL) or Transport Layer Security (TLS)

Answer 20

NAME?

Question 21

Trusted VPN

Answer 21

All traffic on the VPN relies on the security of the provider’s network to protect the network

Question 22

Hybrid VPN

Answer 22

SECURE + TRUSTED VPNs

Question 23

Site-to-Site VPN

Answer 23

NAME?

Question 24

Remote Access VPN

Answer 24

Connect individual hosts to private networks and FACILITATES TELEWORKERS

Question 25

Use of a VPN

Answer 25

#NAME?

Question 26

Protocol

Answer 26

#NAME?

Question 27

Data Packet

Answer 27

Portion of data that is transmitted through a network (contains checksum, parity bit, destination address etc.)

Question 28

What protocols are require for a communication/transfer of data?

Answer 28

#NAME?

Question 29

Network protocols also dictates...

Answer 29

#NAME?

Question 30

Network protocols guarantees...

Answer 30

#NAME?

Question 31

Data Integrity

Answer 31

Checksum mechanisms provide this

Question 32

Source Integrity

Answer 32

Identity of the sender is validated through digital signatures

Question 33

Flow Control

Answer 33

The protocol will request the sending application to slow down the data flow rate if the bandwidth is low

Question 34

Congestion

Answer 34

Congestion happens when the request on the network resources exceeds the offered capacity (solved by flow control or deadlock prevention)

Question 35

Deadlock

Answer 35

When two or more networks are waiting for each other to finish a task and neither ever does in the end (solved by persistence timer)

Question 36

Error checking

Answer 36

A process to find for errors (checksum)

Question 37

Error correction

Answer 37

The ability to fix the error (parity bit)

Question 38

Bandwidth

Answer 38

Theoretical speed of data in a medium

Question 39

Throughput

Answer 39

Actual transfer rate

Question 40

Bottleneck

Answer 40

Slowest segment in a network

Question 41

Goodput

Answer 41

Transfer rate of useful data (the actual data not metadata)

Question 42

Metadata

Answer 42

Checksum, parity bit, destination address, source address etc. (basically all the additional shit that goes with the whatever you are transferring)

Question 43

4 factors that affect speed of transmission

Answer 43

#NAME?

Question 44

Data Compression

Answer 44

Reduces the size of files to be transmitted over a network

Question 45

Lossy data compression

Answer 45

#NAME?

Question 46

Lossless data compression

Answer 46

#NAME?

Question 47

Packet Switching

Answer 47

Refers to a communication method in which data are grouped into packets before transmission

Question 48

Datagram Packet Switching

Answer 48

Packet contains the review address and the path the datagram takes between the destination and source is the same

Question 49

Virtual Circuit Packet Switching

Answer 49

A route from source to destination is set up before any transmission takes place (route is fixed before sending)

Question 50

Advantages of Wireless Connection

Answer 50

#NAME?

Question 51

Disadvantages of Wireless Connection

Answer 51

#NAME?

Question 52

Software needed for wireless network

Answer 52

#NAME?

Question 53

Dynamic Host Configuration Protocol (DHCP)

Answer 53

Allows a server to automatically assign an IP to a client device (router will do it automatically with DHCP)

Question 54

Firewall

Answer 54

Security system that determines what goes in and out of a network

Question 55

Service Set Identification (SSID)

Answer 55

A set of 32 alphanumeric characters used to differentiate one WLAN from another (case sensitive)

Question 56

Network Interface Card (NIC) Drivers

Answer 56

Acts as a translator between the card and the apps or OS of the device

Question 57

Wireless Application Protocol (WAP)

Answer 57

A set of protocols for accessing information over mobile wireless network

Question 58

Encryption

Answer 58

Complex mathematical algorithms and keys to alter data into a form that is not understandable to an unauthorised person

Question 59

Symmetric-key Encryption

Answer 59

Uses the same key for encryption and decryption (can be cracked by brute forcing)

Question 60

Public-key Encryption

Answer 60

Public key is used for encryption and a private key is generated to decrypt (Example: RSA encryption)

Question 61

Medium Access Control (MAC) Address

Answer 61

#NAME?

Question 62

LAN

Answer 62

Computer network that connects computer systems that are within a limited geographical area

Question 63

WLAN

Answer 63

Wireless LAN

Question 64

VLAN

Answer 64

Used to partition the initial LAN, where every department is connected into LOGICAL SEPARATE NETWORKS

Question 65

WAN

Answer 65

LAN but geographically bigger

Question 66

Ways to access to internet

Answer 66

#NAME?

Question 67

VPN

Answer 67

Like a LAN but allows remote clients to connect to the network and appear in the LAN

Question 68

PAN

Answer 68

Interconnects devices that are centerred around an individual person's WORKSPACE

Question 69

VPN tech

Answer 69

Hardware: