Hassan Al-Ibrahim
10-11-2004, 03:51 PM
Salam,
I wanted to start this thing to get the ajer for whomever come after me ;)
These are the answers for the Revision Questions For Semester 1 - Data Communications and Networks 1 B263
Anyway with the Help of Mubarak Al-Marri and Jassir Al-Dossri we came up with these answers and we are still working with the rest of the questions.
1 – Describe:
a - Protocol: A protcol is set of rules that govern the operation of functional unites to achieve communication
b - Peer-to-peer communication: The kind of communication found in a system using layered protocols. Each software or hardware component can be considered to communicate only with its peer in the same layer via the connection provided by the lower layers.
c - Service access point:A conceptual location at which one OSI layer can request the service of another OSI layer.
d - Encapsulation: Data portions of an information unit at a given OSI layer potentially can contatin header, trailers and data from all higher layers
2 - By means of a block diagram, explain the ISO OSI reference model
http://images.google.com/images?q=tbn:N-5JsRHo7JQJ:http://www.cse.dmu.ac.uk/~cfi/Networks/ProtocolsAndArchitectures/ISO7LayerModel.gif (http://www.cse.dmu.ac.uk/~cfi/Networks/ProtocolsAndArchitectures/ISO7LayerModel.gif)
3 – What is the role of the physical layer in the ISO model?
The role of the physical layer: defines the electrical, mechanical, procedural and functional specifications for activating, maintaining, deactivating the physical link between communicating network systems.
4 – What is the role of the data link layer in the ISO model?
The role of data link layer: provide a reliable transit of data across a physical network link. It also provides mechanisms for retransmitting damaged or lost frames.
5 – What is the role of the network layer in the ISO model
The role of network layer: provides routing and related functions that enable multiple data links to be combined into an internetwork (interconnection of networks).
6 – What is the role of the transport layer in the ISO model
The role of transport layer: the network layer for the transfer of information between end systems across a given communication network.
7 – Describe and compare LANs, MANs, WANs.
a – LAN: A local computer network for communication between computers; especially a network connecting computers and word processors and other electronic office equipment to create a communication system between offices.
b – MAN: (MAN) A data network intended to serve an area the size of a large city. Such networks are being implemented by innovative techniques, such as running optical fibre through subway tunnels. A popular example of a MAN is Switched Multimegabit Data Service.
c – WAN: a computer network that spans a wider area than does a local area network.
8 through 10 not avilable :)
11 – What is an internet? What is the internet? What is an intranet?
Internet:
refers to the global information system that --
is logically linked together by a globally unique address space based on the Internet Protocol (IP) or its subsequent extensions/follow-ons;
is able to support communications using the Transmission Control Protocol/Internet Protocol (TCP/IP) suite or its subsequent extensions/follow-ons, and/or other IP-compatible protocols; and
provides, uses or makes accessible, either publicly or privately, high level services layered on the communications and related infrastructure described herein.
The Internet:
The Internet is a global communications network consisting of thousands of networks typically interconnected by fiber optic cabling. It had two parent networks whose joining began the ongoing evolution.
- U. S. Military (Tactical communication in the event of telephone downtime during wartime)
- Academics (Shared information between researchers)
Intranet:
A restricted computer network; a private network created using World Wide Web software
12 - 15 not avilable yet
I wanted to start this thing to get the ajer for whomever come after me ;)
These are the answers for the Revision Questions For Semester 1 - Data Communications and Networks 1 B263
Anyway with the Help of Mubarak Al-Marri and Jassir Al-Dossri we came up with these answers and we are still working with the rest of the questions.
1 – Describe:
a - Protocol: A protcol is set of rules that govern the operation of functional unites to achieve communication
b - Peer-to-peer communication: The kind of communication found in a system using layered protocols. Each software or hardware component can be considered to communicate only with its peer in the same layer via the connection provided by the lower layers.
c - Service access point:A conceptual location at which one OSI layer can request the service of another OSI layer.
d - Encapsulation: Data portions of an information unit at a given OSI layer potentially can contatin header, trailers and data from all higher layers
2 - By means of a block diagram, explain the ISO OSI reference model
http://images.google.com/images?q=tbn:N-5JsRHo7JQJ:http://www.cse.dmu.ac.uk/~cfi/Networks/ProtocolsAndArchitectures/ISO7LayerModel.gif (http://www.cse.dmu.ac.uk/~cfi/Networks/ProtocolsAndArchitectures/ISO7LayerModel.gif)
3 – What is the role of the physical layer in the ISO model?
The role of the physical layer: defines the electrical, mechanical, procedural and functional specifications for activating, maintaining, deactivating the physical link between communicating network systems.
4 – What is the role of the data link layer in the ISO model?
The role of data link layer: provide a reliable transit of data across a physical network link. It also provides mechanisms for retransmitting damaged or lost frames.
5 – What is the role of the network layer in the ISO model
The role of network layer: provides routing and related functions that enable multiple data links to be combined into an internetwork (interconnection of networks).
6 – What is the role of the transport layer in the ISO model
The role of transport layer: the network layer for the transfer of information between end systems across a given communication network.
7 – Describe and compare LANs, MANs, WANs.
a – LAN: A local computer network for communication between computers; especially a network connecting computers and word processors and other electronic office equipment to create a communication system between offices.
b – MAN: (MAN) A data network intended to serve an area the size of a large city. Such networks are being implemented by innovative techniques, such as running optical fibre through subway tunnels. A popular example of a MAN is Switched Multimegabit Data Service.
c – WAN: a computer network that spans a wider area than does a local area network.
8 through 10 not avilable :)
11 – What is an internet? What is the internet? What is an intranet?
Internet:
refers to the global information system that --
is logically linked together by a globally unique address space based on the Internet Protocol (IP) or its subsequent extensions/follow-ons;
is able to support communications using the Transmission Control Protocol/Internet Protocol (TCP/IP) suite or its subsequent extensions/follow-ons, and/or other IP-compatible protocols; and
provides, uses or makes accessible, either publicly or privately, high level services layered on the communications and related infrastructure described herein.
The Internet:
The Internet is a global communications network consisting of thousands of networks typically interconnected by fiber optic cabling. It had two parent networks whose joining began the ongoing evolution.
- U. S. Military (Tactical communication in the event of telephone downtime during wartime)
- Academics (Shared information between researchers)
Intranet:
A restricted computer network; a private network created using World Wide Web software
12 - 15 not avilable yet