QUIZ 4

Which statements describe features or functions of the logical link control sublayer in Ethernet standards?

• Logical link control is specified in the IEEE 802.3 standard.

• The LLC sublayer adds a header and a trailer to the data.

• The data link layer uses LLC to communicate with the upper layers of the protocol suite.

• The LLC sublayer is responsible for the placement and retrieval of frames on and off the media.

What is the minimum Ethernet frame size that will not be discarded by the receiver as a runt frame?

• 64 bytes

• 512 bytes

• 1024 bytes

• 1500 bytes

What statement describes a characteristic of MAC addresses?

• They must be globally unique.

• They are added as part of a Layer 3 PDU.

• They have a 32-bit binary value.

• They are only routable within the private network.

Refer to the exhibit. The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC3. What will the switch do with the frame?

• The switch will discard the frame.

• The switch will forward the frame to all ports.

• The switch will forward the frame only to port 2.

• The switch will forward the frame to all ports except port 4.

What statement describes Ethernet?

• It defines the most common LAN type in the world.

• It is the required Layer 1 and 2 standard for Internet communication.

• It defines a standard model used to describe how networking works.

• It connects multiple sites such as routers located in different countries.

Choose the INCORRECT statement about Three Way Handshake of the TCP protocol.

• Establishes that the destination device is present on the network

• Resolve final delivery issues, such as virus scanning, spam filtering, and return-receipt handling

• Informs the destination device that the source client intends to establish a communication session on that port number

• Verifies that the destination device has an active service and is accepting requests on the destination port number that the initiating client intends to use for the session

A client is downloading a large file from a server using File Transfer Protocol (FTP). One of the segments is lost during the transit. Discover what will happen.

• The FTP session is immediately terminated.

• The FTP client responds to the client with an increased window size in the TCP header

• The FTP client responds to the server with a smaller window size in the TCP header

• The FTP server responds to the client with a smaller window size in the TCP header

Choose the TCP header field specifies the number of segments that can be accepted before an acknowledgement is required.

• Checksum

• Window size

• Header length

• Acknowledgement number

Which address does a NIC use when deciding whether to accept a frame?

• source IP address

• destination IP address

• destination MAC address

• source Ethernet address

The process of placing one message format inside another message format

• message encoding

• message encapsulation

• message sizing

• message timing