The name of the DLL layer PDU (Protocol Data Unit) is:
A. Segment
B. Data stream
C. Packet
D. Frame
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Which layer does not exist in TCP/IP model, but exists in OSI model
A. Network
B. Application
C. Internet
D. Transport
Which statement about ISO model is correct
A. ISO model is better than TCP/IP model
B. ISO model has seven layers
C. ISO model does not use layered structure
D. Application layer consists of differet software such as Web browsers
Is University network a：
A. PAN
B. WAN
C. MAN
D. LAN
What is the topology of a LAN using a router to connect several PCs in a house.
A. Star
Bus
C. Mesh
D. Ring
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