CCNA Modules 4 - 7

Which switching method has the lowest level of latency?

fast-forward

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

goodput

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

1. Source MAC address 2. Destination MAC address 3. Error-checking information*

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

1. Data link layer protocols define the rules for access to different media. 2. Ethernet utilizes CSMA/CD. 3. Media access control provides placement of data frames onto the media.

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

1. Fast-Forward Switching 2. Fragment-Free Switching

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.)

1. Frame Check Sequence 2. Minimum frame size

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

1. Integrates various physical technologies. 2. Provides synchronization between source and target nodes. 3. Controls the NIC responsible for sending and receiving data on the physical medium. 4. Implements a trailer to detect transmission errors. 5. Provides a mechanism to allow multiple devices to communicate over a shared medium.

Which two statements describe the services provided by the data link layer? (Choose two.)

1. It manages the access of frames to the network media. 2. 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.)

1. The data link layer uses LLC to communicate with the upper layers of the protocol suite. 2. Logical link control is implemented in software.

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.)

1. The link between the switches will work at the fastest speed that is supported by both switches. 2. The link between switches will work as full-duplex. 3. The auto-MDIX feature will configure the interfaces eliminating the need for a crossover cable.

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

1. greater bandwidth potential 2. greater distances per cable run

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.)

1. the amount of traffic that is currently crossing the network 2. the type of traffic that is crossing the network 3. the latency that is created by the number of network devices that the data is crossing

What are two actions performed by a Cisco switch? (Choose two.)

1. using the source MAC addresses of frames to build and maintain a MAC address table. 2. utilizing the MAC address table to forward frames via the destination MAC address

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

A physical address is added.

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

Access method

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

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.

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

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 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.

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

The vary depending on protocols.

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​

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

loss of signal strength as distance increases

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