Which is NOT a function performed at the MAC sublayer of the OSI data link layer?

Adds Layer 2 control information to network protocol data.

What is a characteristic of the LLC sublayer?

Allows Layer 3 protocols to use the same network interface and media.

Which statement describes a characteristic of the frame header fields of the data link layer?

They vary depending on protocols.

Which is NOT a way that media access control is used in networking?

Contention-based access is also known as deterministic.

Which statement is true about the CSMA/CD access method that is used in Ethernet?

All network devices must listen before transmitting.

Which statement describes an extended star topology?

Hosts connect to network device, which connects to other network devices

Which statement does NOT describe the services provided by the data link layer?

It defines the end-to-end delivery addressing scheme.

What is the function of the CRC value that is found in the FCS field of a frame?

To verify the integrity of the received frame

What does Ethernet examine to determine if a received frame is passed to the data link layer or discarded by the NIC?

Frame Check Sequence and Minimum Frame Size

Which is NOT a function performed at the LLC sublayer of the OSI data link layer?

Integrates various physical technologies.

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CCNA 1 Module 6 (v.7) Data Link Layer

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Questions 17

Answers

1
Which is NOT a function performed at the MAC sublayer of the OSI data link layer?
Provides synchronization between source and target nodes.
Implements a trailer to detect transmission errors.
Controls the NIC responsible for sending and receiving data on the medium.
Adds Layer 2 control information to network protocol data.
2
What is a characteristic of the LLC sublayer?
Allows Layer 3 protocols to use the same network interface and media.
It defines software processes that provide services to the physical layer.
Delimits data according to physical signaling requirements of the medium.
It provides the logical addressing required that identifies the device.
3
Which statement describes a characteristic of the frame header fields of the data link layer?
They vary depending on protocols.
They include information on user applications.
Ethernet frame header contain Layer 3 source and destination addresses.
They all include the flow control and logical connection fields.
4
Which is NOT a way that media access control is used in networking?
Media access control provides placement of data frames onto the media.
Ethernet utilizes CSMA/CD.
Contention-based access is also known as deterministic.
Data link layer protocols define the rules for access to different media.
5
Which statement is true about the CSMA/CD access method that is used in Ethernet?
Only devices that caused the collision execute a backoff algorithm.
All network devices must listen before transmitting.
When devices hear a carrier signal and transmits, a collision cannot occur.
Devices involved in collision get priority to transmit
6
What is NOT common to all frame types supported by the data link layer?
Data
MTU size
Trailer
Header
7
Which statement describes an extended star topology?
All end and intermediate devices are connected in a chain to each other.
Hosts connect to network device, which connects to other network devices
Hosts are connected to its respective neighbor via an intermediate device.
Hosts are connected by a bus and each bus connects to a network device.
8
Which statement does NOT describe the services provided by the data link layer?
It defines the end-to-end delivery addressing scheme.
Divided into two sub layers, namely LLC and MAC
Packages Layer 3 PDUs into a frame format that is compatible with the NIC
It manages the access of frames to the network media.
9
What is the function of the CRC value that is found in the FCS field of a frame?
To compute the checksum header for the data field in the frame
To verify the logical address in the frame
To verify the integrity of the received frame
To verify the physical address in the frame
10
What is contained in the trailer of a data-link frame?
Physical address
Data
Logical address
Error detection
11
What is NOT contained in an Ethernet header and trailer?
Destination MAC address
Source IP address
Error-checking information
Source MAC address
12
Which media communication type does not require media arbitration in the data link layer?
Half-duplex
Full-duplex
Controlled access
Deterministic
13
Which topology provides high availability and connects some, but not all, remote sites?
Point-to-Point
Partial mesh
Mesh
Hub and Spoke
14
What does Ethernet examine to determine if a received frame is passed to the data link layer or discarded by the NIC?
Source and Destination MAC Address
Source and Destination IP Address
Auto-MDIX and CEF
Frame Check Sequence and Minimum Frame Size
15
Which is NOT a function performed at the LLC sublayer of the OSI data link layer?
Enables IPv4 and IPv6 to utilize the same network interface and media.
Identifies which network layer protocol is being used for the frame.
Integrates various physical technologies.
Adds Layer 2 control information to network protocol data.
16
During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?
The process port number is added.
An physical address is added.
An IP address is added.
An logical address is added.
17
What type of communication rule would best describe CSMA/CD?
Message encapsulation
Access method
Flow control
Message encoding

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