Module 6 Practice Flashcards
What is another name for the OSI data link layer?
Layer 2
The IEEE 802 LAN/MAN data link layer consists of which two sublayers? (Choose two.)
- Logical Link Control
- Media Access Control
What is the responsibility of the MAC sublayer?
Provides the method to get the frame on and off the media
What kind of network would use point-to-point, hub and spoke, or mesh topologies?
WAN
The media access control method used depends on which two criteria?
- Media sharing
- Topology
What Layer 2 function does a router perform? (Choose three.
- Accepts a frame from a medium
- De-encapsulates the frame
- Re-encapsulates the packet into a new frame
Which topology displays networking device layer IP addresses?
logical topology
Which media access control method is used in legacy Ethernet LANs?
carrier sense multiple access/collision detection
Which duplex communication method is used in WLANs?
half-duplex
What is the function of the last field in a data link layer frame?
To determine whether the frame experienced transmission errors
Which LAN topology is a hybrid topology?
extended star
Which organization defines standards for the network access layer (i.e., the OSI physical and data link layers)?
IEEE
What type of physical topology can be created by connecting all Ethernet cables to a central device?
star
What attribute of a NIC would place it at the data link layer of the OSI model?
MAC address
Which is a function of the Logical Link Control (LLC) sublayer?
to identify which network layer protocol is being used
What does the data link layer add to a Layer 3 packet to create a frame? (Choose two.)
- header
- trailer
Which of the following are data link layer protocols? (Choose three)
- 802.11
- Ethernet
- PPP
Which lists the Layer 2 and Layer 3 address fields in the correct order?
destination NIC address, source NIC address, source IP address, destination IP address
Although CSMA/CD is still a feature of Ethernet, why is it no longer necessary?
the use of full-duplex capable Layer 2 switches
What are two services performed by the data link layer of the OSI model? (Choose two.)
- It accepts Layer 3 packets and encapsulates them into frames.
- It provides media access control and performs error detection.
What does a router do after de-encapsulating a received frame?
determines the best path
Which statement describes the half-duplex mode of data transmission?
Data that is transmitted over the network flows in one direction at a time.
What are the two sublayers of the OSI model data link layer? (Choose two.)
LLC
MAC
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?
mesh
Which data link layer media access control method does Ethernet use?
CSMA/CD
Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?
data link
What identifier is used at the data link layer to uniquely identify an Ethernet device?
MAC address
Which two engineering organizations define open standards and protocols that apply to the data link layer? (Choose two.)
- International Organization for Standardization (ISO)
- International Telecommunication Union (ITU)
What method is used to manage contention-based access on a wireless network?
CSMA/CA
What is true concerning physical and logical topologies?
Logical topologies refer to how a network transfers data between devices.
