Computer Networks Quiz

Which model is based on a proposal developed by the International Standards Organization (ISO) as a first step toward international standardization of the protocols used in the various layers?

• The OSI Reference Model

• The Internet structure: network of networks

• The TCP/IP Reference Model

• The Hybrid Reference Model

How many layers does the OSI model have?

• Six layers

• Five layers

• Four layers

• Seven layers

What is the main task of the data link layer (DLL) in the OSI model?

• Establish sessions between users on different machines

• Accept data from above and ensure correct delivery at the other end

• Control the operation of the subnet

• Transform raw transmission facility into a line free of undetected transmission errors

Which layer in the OSI model controls the operation of the subnet?

• Physical Layer

• Data Link Layer

• Network Layer

• Transport Layer

What is the basic function of the transport layer in the OSI model?

• Transform raw transmission facility into a line free of undetected transmission errors

• Accept data from above and ensure correct delivery at the other end

• Control the operation of the subnet

• Determine source-destination route for packets

Which protocol is a reliable connection-oriented protocol in the TCP/IP model?

• Transmission Control Protocol (TCP)

• Hyper Text Transfer Protocol (HTTP)

• User Datagram Protocol (UDP)

• Internet Protocol (IP)

What is the purpose of an Internet exchange point (IXP) in the Internet structure?

• Connect each access ISP to every other access ISP

• Connect regional networks to access ISPs

• Connect each access ISP to a global transit ISP

• Connect different networks to exchange Internet traffic

Which type of switching is more suitable for bursty data and resource sharing?

• Circuit switching

• Packet switching

• Time Division Multiplexing (TDM)

• Frequency Division Multiplexing (FDM)

What is a key difference between the OSI and TCP/IP reference models?

• The OSI model has four layers while the TCP/IP model has seven layers

• The OSI model supports only connection-oriented communication in the network layer

• The OSI model does not mention the physical and data link layers

• The TCP/IP model does not clearly distinguish between service, interface, and protocol

What is a reason why the OSI model did not become widely adopted?

• Bad politics

• Bad implementations

• Bad technology

• Bad timing