Ch. 6

The use of CSMA/CA

Although CSMA/CD is still a feature of Ethernet, why is it no longer necessary?

mesh

A technician has been asked to develop a physical topology for a network that provides a high level of redundancy. Which physical topology requires that every node is attached to every other node on the network?

Logical Link Control (LLC), Media Access Control (MAC)

The IEEE 802 LAN/MAN data link layer consists of which two sublayers? (Choose two.)

Media sharing. Topology

The media access control method used depends on which two criteria?

Accepts a frame from a medium, De-Encapsulates the frame, Re-encapsulates the packet into a new frame

What Layer 2 function does a router perform? (Choose three.)

MAC, LLC

What are the two sublayers of the OSI model data link layer? (Choose two.)

It determines the path to forward packets, It provides media access control and performs error dection.

What are two services performed by the data link layer of the OSI model? (Choose two.)

MAC address

What attribute of a NIC would place it at the data link layer of the OSI model?

header, trailer

What does the data link layer add to a Layer 3 packet to create a frame? (Choose two.)

MAC address

What identifier is used at the data link layer to uniquely identify an Ethernet device?

Layer 2

What is another name for the OSI data link layer?

To determine whether the frame experienced transmission errors

What is the function of the last field in a data link layer frame?

Provides the method to get the frame on and off the media.

What is the responsibility of the MAC sublayer?

Logical topologies refer to how a network transfers data between devices

What is true concerning physical and logical topologies?

WAN

What kind of network would use point-to-point, hub and spoke, or mesh topologies?

CSMA/CA

What method is used to manage contention-based access on a wireless network?

star

What type of physical topology can be created by connecting all Ethernet cables to a central device?

Extended Star

Which LAN topology is a hybrid topology?

CSMA/CD

Which data link layer media access control method does Ethernet use with legacy Ethernet hubs?

half-duplex

Which duplex communication method is used in WLANs?

to accept segments and package them into data units that are called packets

Which is a function of the Logical Link Control (LLC) sublayer?

data link layer

Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?

Destination NIC address, Source NIC address, Source IP address, Destination IP address

Which lists the Layer 2 and Layer 3 address fields in the correct order?

Carrier sense multiple access/collision detection (CSMA/CD)

Which media access control method is used in legacy Ethernet LANs?

802.11, Ethernet, PPP

Which of the following are data link layer protocols? (Choose three)

IEEE

Which organization defines standards for the network access layer (i.e., the OSI physical and data link layers)?

Data that is transmitted over the network flows in one direction at a time.

Which statement describes the half-duplex mode of data transmission?

logical topology

Which topology displays networking device layer IP addresses?

ITU, IEEE

Which two engineering organizations define open standards and protocols that apply to the data link layer? (Choose two.)