Cisco Systems 2 manual Which two physical interfaces does PPP support? Choose two, Answers C, D

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A.A Filtering table is developed for each switch.

B.Frame Tagging defines a unique user defined ID to each frame.

C.A unique identifier is placed in the header of each frame as it is forwarding between switches.

D.Frame Tagging is technique that examines particular information about each frame based on user- defined offsets.

Answer: B, C.

Explanation: Frame tagging or frame identification uniquely assigns a user-defined Id to each frame. This is sometimes referred to as VLAN ID. Cisco created frame tagging to be used when an Ethernet frame traverses a trunked link.

Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 186-187.

Q. 230

Which two physical interfaces does PPP support? (Choose two)

A.Ethernet

B.Token Ring

C.Synchronous Serial

D.Asynchronous Serial

Answers: C, D.

Explanation: Point-to-Point Protocol (PPP) provides router-to-router and host-network connections over synchronous and asynchronous circuits. PPP was designed to work with several network layer protocols, including IP and IPX. It also has built in security features such PAP (Password Authentication Protocol) and CHAP (Challenged Handshake Authentication Protocol).

Incorrect Answers:

A is incorrect; Ethernet is a LAN (Local Area Network) architecture. It uses either a star or a bus topology to exchange data.

B is incorrect; Token Ring is a type of network in which the computers are arranged in a circular fashion. These computers pass a token between each other. This token is used to communicate data.

Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) page 373.

Q. 231

What is a disadvantage of using a connection-oriented protocol such as TCP?

A.Packet acknowledgement may add overhead

B.Packets are not tagged with sequence numbers

C.Loss or duplication of data packets is more likely to occur

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