Advanced Network Security Questions & Answers on “TCP/IP and OSI Reference Model”.
1. In terms of the size of the network the correct order (ascending) is –
a) PAN, MAN, LAN, WAN
b) LAN, MAN, WAN, PAN
c) PAN, LAN, MAN, WAN
d) LAN, PAN, MAN, WAN
Answer: c
Clarification: Personal Area Network, Local Area Network, Metropolitan Area Network, Wide Area Network is the correct order in terms of size of the network from smallest to largest.
2. How many layers are there in the OSI reference model?
a) 4
b) 5
c) 6
d) 7
Answer: d
Clarification: The 7 layers are : Physical Layer, Data Link Layer, Network Layer, Transport Layer, Session Layer, Presentation Layer, Application Layer.
3. Logical Addressing and Routing are functions of which layer?
a) Physical Layer
b) Transport Layer
c) Data Link Layer
d) Network Layer
Answer: d
Clarification: . Logical Addressing and Routing are functions of the Network Layer.
4. Flow Control and Error Control are functions of which layer?
a) Physical Layer
b) Application Layer
c) Data Link Layer
d) Network Layer
Answer: c
Clarification: Flow Control and Error Control are functions of the Data Link Layer.
5. Dialog Control and Synchronization are function of which layer?
a) Presentation Layer
b) Application Layer
c) Session Layer
d) Data Link Layer
Answer: c
Clarification: Dialog Control and Synchronization are function of the Session Layer.
6.Encryption and Compression are functions of which OSI layer?
a) Presentation Layer
b) Application Layer
c) Session Layer
d) Data Link Layer
Answer: a
Clarification: Encryption and Compression are functions of the Presentation Layer.
7. File, Transfer, Access and Management (FTAM) is a function of which layer ?
a) Presentation Layer
b) Application Layer
c) Session Layer
d) Data Link Layer
Answer: b
Clarification: FTAM is an Application Layer function.
8. How many layers are present in the TCP/IP Reference model?
a) 6
b) 7
c) 5
d) 4
Answer: d
Clarification: There are 4 layers in the TCP/IP reference model : Link, Internet, Transport and Application.