ethernet concepts exam
wireless
#1Guest access in a coffee shop #2 Waiting rooms in a hospital
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.)
-The data link layer uses LLC to communicate with the upper layers of the protocol suite. -Logical link control is implemented in software.
Refer to the exhibit. What is wrong with the displayed termination?
The untwisted length of each wire is too long
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
In addition to the cable length, what two factors could interfere with the communication carried over UTP cables? (Choose two.)
crosstalk, electromagnetic interference
During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?
the physical address is added.
Which statement describes a characteristic of the frame header fields of the data link layer?
they vary depending on protocols
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.)
using the source MAC addresses of frames to build and maintain a MAC address table and utilizing the MAC address table to forward frames via the destination MAC address
copper cables
#1 Horizantal cablingStructure #2 Desktop PCs in an enterprise office
fiber optic
#1Backbone cabling in an enterprise #2 Long Haul networks
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
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 an extended star topology?
End devices connect to a central intermediate device, which in turn connects to other central intermediate devices.
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 two functions are performed at the MAC sublayer of the OSI data link layer? (Choose two.)
Implements a trailer to detect transmission errors and Controls the NIC responsible for sending and receiving data on the physical medium.
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 is contained in the trailer of a data-link frame?
error detection
Which switching method has the lowest level of latency?
fast-forward
Refer to the graphic. What type of cabling is shown?
fiber
What are two examples of the cut-through switching method? (Choose two.)
fragment-free switching, fast-forward 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.)
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? (Choose three.)
greater bandwidth potential greater distances per cable run limited susceptibility to EMI/RFI
Which three basic parts are common to all frame types supported by the data link layer? (Choose three.)
header, data, trailer
What does the term "attenuation" mean in data communication?
loss of signal strength as distance increases
Which two devices commonly affect wireless networks? (Choose two.)
microwaves, cordless phones
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
Which switching method uses the CRC value in a frame?
store-and-forward
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 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
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.
