1. In terms of physical-level, security for stand-alone PC: 1.1 It is more secur
ID: 3725230 • Letter: 1
Question
1. In terms of physical-level, security for stand-alone PC: 1.1 It is more secure than networked one 1.2 Has the same level of security as networked PC; 1.3 Depends on the protocols used in the network:; 1-4 Depends on the size of the PC memory. 2 What is NOT true: 2.1 Traditional Wide Area Networks (WAN) has more nodes than Local Area Networks (LAN); 2.2 Traditional LANs are faster than WANs; 2.3 Traditional WANs are faster than LANs; 2.4 Traditional LANs and WANs use different communication technologies 3 The client-server communication based on: 3.1 The request-reply model; 3.2 Ability of the network to send data with very high speed; 3.3 Ability of the client machine to display graphical information; 3.4 Ability of the client machine to save a lot of data on its hard drive. 4. In the OSI Communication model Horizontal communication is the communication between: 4.1 Similar layers in both of communication parties; 4.2 Two layers on the same network node; 4.3. Any communication between client and server 4.4 Any communication between two clients. 5. During the communication between two parties the information always goes through the process called: 5.1 Compilation-decompilation; 5.2 Calculation-decalculation; 5.3 Compression- decompression; 5.4 Encapsulation-decapsulation. 6. Which protocol provides connection-oriented communication? 6.1 UDP; 6.2 IP 6.3.ICMP; 6.4, TCP 7. Which protocol intended to provide better reliability? 7.1 Connection-oriented; 7.2 Connectionless; 7.3 Both have the same level of reliability 7.4 Depends on the type of the data transmitted; 8. If a message is too long to be sent through the Internet as is, it will be: 8.1 Truncated; 8.2. Fragmented; 8.3 Rejected; 8.4 Sent back to the source node;Explanation / Answer
1.
Ans:
1.1 It is more secure than networked one
Reason:
If it is attached to a network attacks are possible from various ways like virus, hacker etc.
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2.
Ans:
2.1 Traditional WAN has more nodes than local area networks
Reason:
WAN is world wide spreaded, so more computers are available.
LAN is with in the company or building. So it less size
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3. Ans:
3.1 The request-reply model
Reason:
If client needs information, it send a request to the server.
If the server has the required information, it send reply back to the client.
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4.
Ans:
4.1 Similar layers in both of communication parties
Reason:
It is the communication between the peer entities through a virtual connection in different
systems to complete a service request.
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5.
Ans:
5.3 Compression-Decompression
Reason:
Compression transforms original data to another form. Decompression recovers the original data from compressed data
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6.
Ans:
6.4 TCP
Reason:
It requires a session establishment before the data transmission; so it is called connection-oriented.
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7.
Ans:
7.1 Connection-oriented
Reason:
Connection-oriented protocols guarantees that data will be received in the proper sequence
at the receiver side. That is,it provides assurance of the delivery of data to the intended recipient(s).
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8.
Ans:
8.2 Fragmented
Reason:
Fragmentation breaks message into smaller pieces called fragments (Packets).
They can easily pass through a the communication medium than the original lengthy message.
These fragments can be reassembled at the receiver side.
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