ITN Ethernet Concepts Exam

Refer to the exhibit. What is the destination MAC address of the Ethernet frame as it leaves the web server if the final destination is PC1?

00-60-2F-3A-07-CC

Which is a multicast MAC address?

01-00-5E-00-00-03

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

All network devices must listen before transmitting

When the store-and-forward method of switching is in use, what part of the Ethernet frame is used to perform an error check?

CRC in the trailer

In addition to the cable length, what two factors could interfere with the communication carried over UTP cables?

Crosstalk Electromagnetic interference

Which two functions are performed at the LLC sublayer of the OSI data link layer?

Enables IPv4 and IPv6 to utilize the same network interface and media. Places information in the frame that identifies which network layer protocol is being used for the frame.

Which statement describes an extended star topology?

End devices connect to a central intermediate device, which in turn connects to other central intermediate devices.

What are three ways that media access control is used in networking?

Ethernet utilizes CSMA/CD. Data link layer protocols define the rules for access to different media. Media access control provides placement of data frames onto the media.

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.Which port does Switch0 use to send frames to the host with the IPv4 address 10.1.1.5?

Fa0/1

What is one advantage of using the cut-through switching method instead of the store-and-forward switching method?

Has a lower latency appropriate for high performance computing applications

Which three basic parts are common to all frame types supported by the data link layer?

Header, data, and trailer

A network team is comparing physical WAN topologies for connecting remote sites to a headquarters building. Which topology provides high availability and connects some, but not all, remote sites?

IDK MAYBE partial mesh

What is the auto-MDIX feature?

It enables a device to automatically configure an interface to use a straight-through or a crossover cable.

What are two characteristics of fiber-optic cable?

It is not affected by EMI or RFI. It is more expensive than UTP cabling is.

Which two statements describe the services provided by the data link layer?

It managers the access of frames to the network media It packages various Layer 3 PDUs into a frame format that is ompatible with the network interface

Which two devices commonly affect wireless networks?

Microwave cordless phones

Which switching method uses the CRC value in a frame?

Store-and-forward

A network administrator is connecting two modern switches using a straight-through cable. The switches are new and have never been configured. Which three statements are correct about the final result of the connection?

The link between the switches will work at the fastest speed that is supported by both switches. The link between switches will work as full-duplex. The auto-MDIX feature will configure the interfaces eliminating the need for a crossover cable.

What action will occur if a switch receives a frame with the destination MAC address 01:00:5E:00:00:D9?

The switch forwards it out all ports except the ingress port.

Refer to the exhibit. What is wrong with the displayed termination?

The untwisted length of each wire is too long.

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

They vary depending on protocols

Refer to the graphic. What type of cabling is shown?

UTP

What type of communication rule would best describe CSMA/CD?

access method

What OSI physical layer term describes the capacity at which a medium can carry data?

bandwith

Refer to the graphic. What type of cabling is shown?

coax

What OSI physical layer term describes the physical medium which uses electrical pulses?

copper cable

What is a primary role of the Physical layer in transmitting data on the network?

create the signals that represent the bits in each frame on to the media

What is contained in the trailer of a data-link frame?

error detection and error correction bits

Which switching method has the lowest level of latency?

fast-forward

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

frame check sequence minimum frame size

Which advantage does the store-and-forward switching method have compared with the cut-through switching method?

frame error checking

Which media communication type does not require media arbitration in the data link layer?

full-duplex

What makes fiber preferable to copper cabling for interconnecting buildings?

limited susceptibility to EMI/RFI Greater distances per cable run Greater bandwith potential

What does the term "attenuation" mean in data communication?

loss of signal strength as distance increases

Refer to the exhibit. The PC is connected to the console port of the switch. All the other connections are made through FastEthernet links. Which types of UTP cables can be used to connect the devices?​

rollover straight through crossover

A Layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100Base-T network. Which method of memory buffering would work best for this task?

shared memory buffering

Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?

store-and-forward

A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput?

the amount of traffic that is currently crossing the network the type of traffic that is crossing the network the latency that is created by the number of network devices that the data is crossing

What is the auto-MDIX feature on a switch?

the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection

With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?

the magnetic field around the adjacent pairs of wire.

During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?

the physical address is added

What action will occur if a switch receives a frame and does have the source MAC address in the MAC table?

the switch refreses the timer on that entry

What is the purpose of the FCS field in a frame?

to determine if errors occurred in the transmission and reception

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 are two actions performed by a Cisco switch?

using the source MAC addresses of frames to build and maintain a MAC address table utilizing the MAC address table to forward frames via the destination MAC address