key terms

Question 1

TCP/IP layers

Answer 1

Application Layer
Transport Layer
Internet Layer
Network/Data Link Layer

Question 2

Peer to peer entwork

Answer 2

Devices on the network have equal status/no (central) server.
Devices on the network share data

Question 3

Application Layer

Answer 3

The protocols in this layer provide access to email, files and websites across an IP network.
(HTTP, FTP)

Question 4

Transport Layer

Answer 4

It is responsible for dividng messages into packets, adding sequence numbers and error correction information. It also checks and deals with errors of received data packets
(TCP)

Question 5

Internet Layer

Answer 5

It is responsible for managing the address of source and destination locations
(IP)

Question 6

Network/ Data Link Access

Answer 6

The protocols in this layer are responsible for actually transmitting and receiving data through cable or wireless
(ETHERNET, Wi-Fi)

Question 7

What is a port?

Answer 7

A port is the endpoint for network communication. It’s the address for a specific application or process within the computer that the message is sent to

Question 8

Cache

Answer 8

A small amount of memory which is part of the CPU

Question 9

Registers

Answer 9

A small piece of memory within the processor

Question 10

Stacks

Answer 10

A data structure that operates on a first in last out basis

Question 11

ASCII

Answer 11

American Standard Code for Information Interchange. A character set that uses 7/8 bits per character

Question 12

Unicode

Answer 12

an international encoding standard for use with different languages and scripts, by which each letter, digit, or symbol is assigned a unique numeric value that applies across different platforms and programs.

Question 13

Drivers

Answer 13

A program/software
That controls a piece of hardware
Providing an interface/bridge between the device and (operating) system

Question 14

Virtual Machines

Answer 14

• A virtual machine is a piece of software that behaves in the same way as an actual computer.
• Some VMs are used to interpret intermediate code.

AO2

• VMs of different consoles allow the program to be tested for different machines from the programmer’s computer.
• Saves space and the time and cost of setting up multiple systems.
• Requires a powerful computer (as must run its own OS and the VM).
• The VMs need to be accurate representations of the physical machine or the final code will not work on them.
• Game could be written in a language that is interpreted to intermediate code and is run off a VM.
• This means only one version of the code needs be written and it will run on all systems.
• This saves time and maximizes profits.
• However the game will run more slowly than if it had been compiled to native code.

AO3

• Using Virtual Machines may be a useful tool during testing, saving time.
• Realistically physical machines will have to be used at some point to be 100% sure everything works as it should.
• Using a VM to run intermediate code makes it easy to release for a variety of platforms.
• But will be at the expense of game performance.