ITN 4-7

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

error detection

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 OSI physical layer term describes the measure of usable data transferred over a given period of time?

goodput

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

store-and-forward

Which switching method uses the CRC value in a frame?

store-and-forward

Which is a multicast MAC address?

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

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.

What action will occur if a host receives a frame with a destination MAC address of FF:FF:FF:FF:FF:FF?

The host will process the frame.

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

access method

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

air

Fiber Optic

backbone cabling in an enterprise long-haul networks

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

bandwidth

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 are two examples of the cut-through switching method? (Choose two.) store-and-forward switching fast-forward switching CRC switching fragment-free switching QOS switching

fast-forward fragment-free

What OSI physical layer term describes the physical medium that uses the propagation of light?

fiber-optic

What OSI physical layer term describes the amount of time, including delays, for data to travel from one point to another?

latency

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

loss of signal strength as distance increases

What OSI physical layer term describes the process by which one wave modifies another wave?

modulation

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

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

Which two functions are performed at the LLC sublayer of the OSI data link layer? (Choose two.) 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. Integrates various physical technologies. Implements a process to delimit fields within a Layer 2 frame. Controls the NIC responsible for sending and receiving data on the physical medium.

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.

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 sophistication of the encapsulation method applied to the data 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 the bandwidth of the WAN connection to the Internet the reliability of the gigabit Ethernet infrastructure of the backbone

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

What OSI physical layer term describes the measure of the transfer of bits across a medium over a given period of time?

throughput

Which two functions are performed at the MAC sublayer of the OSI data link layer? (Choose two.) Implements a trailer to detect transmission errors. Controls the NIC responsible for sending and receiving data on the physical medium. Places information in the frame that identifies which network layer protocol is being used for the frame. Adds Layer 2 control information to network protocol data. Enables IPv4 and IPv6 to utilize the same network interface and media.

Implements a trailer to detect transmission errors. Controls the NIC responsible for sending and receiving data on the physical medium.

Which two functions are performed at the MAC sublayer of the OSI data link layer? (Choose two.) Provides a mechanism to allow multiple devices to communicate over a shared medium. Controls the NIC responsible for sending and receiving data on the physical medium. Places information in the frame that identifies which network layer protocol is being used for the frame. Adds Layer 2 control information to network protocol data. Communicates between the networking software at the upper layers and the device hardware at the lower layers.

Provides a mechanism to allow multiple devices to communicate over a shared medium. Controls the NIC responsible for sending and receiving data on the physical medium.

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. Enables IPv4 and IPv6 to utilize the same network interface and media. Provides data link layer addressing. Implements a trailer to detect transmission errors. Provides synchronization between source and target nodes.

Adds Layer 2 control information to network protocol data. Enables IPv4 and IPv6 to utilize the same network interface and media.

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. Performs data encapsulation. Controls the NIC responsible for sending and receiving data on the physical medium. Integrates various physical technologies.

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.

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

All network devices must listen before transmitting.

Which two functions are performed at the MAC sublayer of the OSI data link layer? (Choose two.) Controls the NIC responsible for sending and receiving data on the physical medium. Integrates various physical technologies. Communicates between the networking software at the upper layers and the device hardware at the lower layers. 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.

Controls the NIC responsible for sending and receiving data on the physical medium. Integrates various physical technologies.

What are two characteristics of fiber-optic cable? (Choose two.) It is not affected by EMI or RFI. Each pair of cables is wrapped in metallic foil. It combines the technique of cancellation, shielding, and twisting to protect data. It typically contains 4 pairs of fiber-optic wires. It is more expensive than UTP cabling is.

Each pair of cables is wrapped in metallic foil. It is more expensive than UTP cabling is.

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? (Choose three.) Ethernet utilizes CSMA/CD. Media access control provides placement of data frames onto the media. Contention-based access is also known as deterministic. 802.11 utilizes CSMA/CD. Data link layer protocols define the rules for access to different media. Networks with controlled access have reduced performance due to data collisions.

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

Fa0/11

Which switching method has the lowest level of latency?

Fast-forward

Which two functions are performed at the MAC sublayer of the OSI data link layer? (Choose two.) Implements a trailer to detect transmission errors. Provides synchronization between source and target nodes. Places information in the frame that identifies which network layer protocol is being used for the frame. Enables IPv4 and IPv6 to utilize the same network interface and media. Adds Layer 2 control information to network protocol data.

Implements a trailer to detect transmission errors. Provides synchronization between source and target nodes.

What is the auto-MDIX feature?

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

Which two statements describe the services provided by the data link layer? (Choose two.) It defines the end-to-end delivery addressing scheme. It maintains the path between the source and destination devices during the data transmission. It manages the access of frames to the network media. It provides reliable delivery through link establishment and flow control. It ensures that application data will be transmitted according to the prioritization. It packages various Layer 3 PDUs into a frame format that is compatible with the network interface.

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. Logical link control is specified in the IEEE 802.3 standard. The LLC sublayer adds a header and a trailer to the data. The data link layer uses LLC to communicate with the upper layers of the protocol suite. The LLC sublayer is responsible for the placement and retrieval of frames on and off the medi

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

Which two functions are performed at the MAC sublayer of the OSI data link layer? (Choose two.) Provides synchronization between source and target nodes. Integrates various physical technologies. Communicates between the networking software at the upper layers and the device hardware at the lower layers. Adds Layer 2 control information to network protocol data. Enables IPv4 and IPv6 to utilize the same network interface and media.

Provides synchronization between source and target nodes. Integrates various physical technologies.

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

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?​

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

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?

The untwisted length of each wire is too long.

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

Fiber

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

UTP

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

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 the switches will work at the fastest speed that is supported by both switches. The link between switches will work as full-duplex. If both switches support different speeds, they will each work at their own fastest speed. The auto-MDIX feature will configure the interfaces eliminating the need for a crossover cable. The connection will not be possible unless the administrator changes the cable to a crossover cable. The duplex capability has to be manually configured because it cannot be negotiated.

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.

What action will occur if a switch receives a frame with the destination MAC address FF:FF:FF:FF:FF:FF?

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

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

The switch refreshes the timer on that entry.

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

They vary depending on protocols

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

copper cable

Which two devices commonly affect wireless networks? (Choose two.) Blu-ray players home theaters cordless phones microwaves incandescent light bulbs external hard drives

cordless phones microwaves

In addition to the cable length, what two factors could interfere with the communication carried over UTP cables? (Choose two.) crosstalk bandwidth size of the network signal modulation technique electromagnetic interference

crosstalk electromagnetic interference

What makes fiber preferable to copper cabling for interconnecting buildings? (Choose three.) greater distances per cable run lower installation cost limited susceptibility to EMI/RFI durable connections greater bandwidth potential easily terminated

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

Wireless

guest access in a coffee shop waiting rooms in a hospital

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? (Choose three.) header type field MTU size data trailer CRC value

header data trailer

Copper cables

horizontal cabling structure desktop PCs in an enterprise office

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

What three items are contained in an Ethernet header and trailer? (Choose three.) source IP address source MAC address destination IP address destination MAC address error-checking information

source MAC address destination MAC address error-checking information

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

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? (Choose two.) auto-MDIX CEF Frame Check Sequence minimum frame size source MAC address

Frame Check Sequence minimum frame size

What is a characteristic of the LLC sublayer?

It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.

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

to determine if errors occurred in the transmission and reception

What are two actions performed by a Cisco switch? (Choose two.) building a routing table that is based on the first IP address in the frame header using the source MAC addresses of frames to build and maintain a MAC address table forwarding frames with unknown destination IP addresses to the default gateway utilizing the MAC address table to forward frames via the destination MAC address examining the destination MAC address to add new entries to the MAC address table

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