ethernet concepts exam ver 7.00

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?​

1 - rollover, 2 - straight-through, 3 - crossover

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

They vary depending on protocols.

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

All network devices must listen before transmitting.

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

error detection

Which switching method has the lowest level of latency?

fast-forward

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

frame error checking

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 switching method uses the CRC value in a frame?

store-and-forward

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

What action will occur if a host receives a frame with a destination MAC address it does not recognize?

The host will discard the frame.

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

The physical address is added.

(Picture is green RJ45 with clear cap, wires are exposed at the neck) Refer to the exhibit. What is wrong with the displayed termination?

(Picture is green RJ45 with clear cap, wires are exposed at the neck) The untwisted length of each wire is too long.

Which two functions are performed at the LLC sublayer of the OSI data link layer? (Choose two.)

- Adds Layer 2 control information to network protocol data. - Places information in the frame that identifies which network layer protocol is being used for the frame.

What are three ways that media access control is used in networking? (Choose three.)

- 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.

What are two characteristics of fiber-optic cable? (Choose two.)

- 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? (Choose two.)

- It manages the access of frames to the network media. - It packages various Layer 3 PDUs into a frame format that is compatible with the network interface

Which two statements describe features or functions of the logical link control sublayer in Ethernet standards? (Choose two.)

- Logical link control is implemented in software. - The data link layer uses LLC to communicate with the upper layers of the protocol suite.

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? (Choose three.)

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

Which two devices commonly affect wireless networks? (Choose two.)

- cordless phones - microwaves

What three items are contained in an Ethernet header and trailer? (Choose three.)

- destination MAC address - source MAC address - error-checking information

What are two examples of the cut-through switching method? (Choose two.)

- fragment-free switching - fast-forward switching

What makes fiber preferable to copper cabling for interconnecting buildings? (Choose three.)

- limited susceptibility to EMI/RFI - greater distances per cable run - greater bandwidth potential

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? (Choose three.)

- 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

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

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?

Fa0/11 Steps: 1. Go to PC0, command, type ipconfig /all. View the MAC/physical address. 2. Go to Pc0 terminal. 3. Type show-mac-address-table 4. Find Mac/port entry that belongs to PC0. Do not select this one. 5. The other MAC/port entry belongs to the switch. This switch uses port Fa0/11.

(Picture is a blue-wrapped set of wires with green, brown, orange, and blue in that order)

UTP

What OSI physical layer term describes the physical medium for microwave transmissions?

air

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 does the term "attenuation" mean in data communication?

loss of signal strength as distance increases

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?

partial mesh

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

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

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