Module 6-7 Exam Flashcards
(31 cards)
In addition to cable length, what 2 factors could interfere with the communication carried over UTP cables?
Electromagnetic interference
Crosstalk
What is a primary role of the the Physical Layer in transmitting data on the network?
Create the signals that represent the bits in each frame on to the media
A network admin is measuring the transfer of bits across the company backbone for a mission critical financial application. The admin notices the network throughput appears lower than the bandwidth expected. Which 3 factors could influence differences in throughput?
1 Type of traffic crossing the network
2 Amount of traffic crossing
3 Latency that is created by the number of network devices that the data is crossing
With the use of unshelled twisted pair copper wire in a network, what causes crosstalk within the cable pairs?
The magnetic field around the adjacent pairs of wire
What describes an extended star topology?
End devices connect to a central intermediate device, which in turn connects to other central intermediate devices.
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?
Minimum frame size
Frame Check Sequence
During the encapsulation process, what occurs at the data link later for a PC connected to an Ethernet network?
?
Which 2 statements describe the services provided by the data link layer?
- It manages the access of frames to the network media
2.
Which media communication type does not require media arbitration in the data link layer?
Full duplex
A network team is comparing physical WAN topologies for connecting remote sites to a headquarters building. Which topology provides high availability and connects some not not all remote sites?
Partial mesh
Which 3 basic parts are common to all frame types supported by the data link layer?
1 Trailer
2 Data
3 Header
Which 3 are contained in an Ethernet header and trailer?
Destination MAC address
Error checking information
Source MAC address
What is a characteristic of the LLC sub layer?
?
What are two examples of the cut through switching method?
- Fragment free switching
- ?
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’s 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 frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?
Store-and-forward switching
What are two actions performed by a Cisco switch?
?
What is the purpose of the FCS field in a frame?
To determine if errors occurred in the transmission and reception
Which switching method has the lowest latency level?
?
A network admin is connecting two modern switches using a straight through cable. The switches are new and have never been configured. Which statements are correct about the final connection result?
- The link btwn the switches will work at the fastest speed that is supported by both switches
- The link btwn switches will work as a full duplex
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?
Shared memory buffering
Which is a multi cast MAC address?
01-00-5E-00-00-03
