We've found 5 Data Link Layer tests

Cisco Computer Networks Data Data Link Layer Destination Mac Address Hardware Network Interface Card Send And Receive
6.2 Network Hardware – Flashcards 9 terms
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Rae Jordan
9 terms
Cisco Computer Networks Data Link Layer Network Security Network Technology Tcp And Udp
Network Layer Protocol and Transport Layer Protocol Review – Flashcards 106 terms
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Edwin Holland
106 terms
Cisco Data Link Layer Destination Mac Address Digital Subscriber Line Fault Tolerance Fiber Optic Cable Internet Service Providers
NTEN 123 – IoE – Flashcards 42 terms
Stephanie Landry avatar
Stephanie Landry
42 terms
Cisco Data Data Link Layer Network Security Networking Networks Software
Chapter 7 Understanding Wireless Security – Flashcards 25 terms
Ben Powell avatar
Ben Powell
25 terms
Cisco Data Link Layer Hub And Spoke Network Topology Tcp And Udp
Flashcards About Practice Exam 1 146 terms
Lesly Ford avatar
Lesly Ford
146 terms
What are the two sublayers of the Data Link Layer?
The Logical Link Control (LLC) sublayer and the Media Access Control (MAC) sublayer.
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At what level of the OSI model does the IP protocol function? a. Data link Layer b. Network Layer c. Transport Layer d. Presentation Layer
While troubleshooting a network connectivity problem, a technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However, when the ping command is issued from the workstation, the output message “Request timed out.” is displayed. At which layer of the OSI model does the problem most likely exist? A. the access layer B. the application layer C. the network layer D. the session layer E. the data link layer F. the protocol layer
Answer: C Explanation: The ICMP protocol operates at the network layer.
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What are some network devices that operate at the data link layer (Layer 2)?
Bridges and switches are network devices that operate at the data link layer. Both devices make decisions about what traffic to forward, flood, or drop (filter) by MAC addresses, and logical network addresses are not used at this layer. Data link layer devices assume a flat address space. Typically, a bridge is designed to create two or more LAN segments and is software implemented. A switch is a hardware version of a bridge, has many more ports than a bridge, and is designed to replace a hub while providing the filtering benefits of a bridge.
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A hub operates at – Layer 1, the physical layer – Layer 2, the data link layer – Layer 2, the MAC layer – Layer 3, the network layer
Layer 1, the physical layer
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A protocol analyzer, such as Wireshark, gives the ability to listen in on network traffic as it moves through the Application layer to the Data Link layer and vice versa.
Which of the following correctly describe steps in the OSI data encapsulation process? (Choose two) A. The data link layer adds physical source and destination addresses and an FCS to the segment. B. The transport layer divides a data stream into segments and adds reliability and flow control information. C. The presentation layer translates bits into voltages for transmission across the physical link. D. Packets are created when the network layer adds Layer 3 addresses and control information to a segment
Answer: B,D Explanation: The Application Layer (Layer 7) refers to communications services to applications and is the interface between the network and the application. Examples include: Telnet, HTTP, FTP, Internet browsers, NFS, SMTP gateways, SNMP, X.400 mail, and FTAM. The Presentation Layer (Layer 6) defining data formats, such as ASCII text, EBCDIC text, binary, BCD, and JPEG. Encryption also is defined as a presentation layer service. Examples include: Cisco 640-802: Practice Exam “Pass Any Exam. Any Time.” – www.actualtests.com 13 ActualTests.com JPEG, ASCII, EBCDIC, TIFF, GIF, PICT, encryption, MPEG, and MIDI . The Session Layer (Layer 5) defines how to start, control, and end communication sessions. This includes the control and management of multiple bidirectional messages so that the application can be notified if only some of a series of messages are completed. This allows the presentation layer to have a seamless view of an incoming stream of data. The presentation layer can be presented with data if all flows occur in some cases. Examples include: RPC, SQL, NFS, NetBios names, AppleTalk ASP, and DECnet SCP The Transport Layer (Layer 4) defines several functions, including the choice of protocols. The most important Layer 4 functions are error recovery and flow control. The transport layer may provide for retransmission, i.e., error recovery, and may use flow control to prevent unnecessary congestion by attempting to send data at a rate that the network can accommodate, or it might not, depending on the choice of protocols. Multiplexing of incoming data for different flows to applications on the same host is also performed. Reordering of the incoming data stream when packets arrive out of order is included. Examples include: TCP, UDP, and SPX. The Network Layer (Layer 3) defines end-to-end delivery of packets and defines logical addressing to accomplish this. It also defines how routing works and how routes are learned; and how to fragment a packet into smaller packets to accommodate media with smaller maximum transmission unit sizes. Examples include: IP, IPX, AppleTalk DDP, and ICMP. Both IP and IPX define logical addressing, routing, the learning of routing information, and end-to-end delivery rules. The IP and IPX protocols most closely match the OSI network layer (Layer 3) and are called Layer 3 protocols because their functions most closely match OSI’s Layer 3. The Data Link Layer (Layer 2) is concerned with getting data across one particular link or medium. The data link protocols define delivery across an individual link. These protocols are necessarily concerned with the type of media in use. Examples include: IEEE 802.3/802.2, HDLC, Frame Relay, PPP, FDDI, ATM, and IEEE 802.5/802.2. The Physical Layer (Layer 1) deals with the physical characteristics of the transmission medium. Connectors, pins, use of pins, electrical currents, encoding, and light modulation are all part of different physical layer specifications. Examples includes: EIA/TIA-232, V.35, EIA/TIA-449, V.24, RJ-45, Ethernet, 802.3, 802.5, FDDI, NRZI, NRZ, and B8ZS. The Transport Layer : You can think of the transport layer of the OSI model as a boundary between the upper and lower protocols. The transport layer provides a data transport service that shields the upper layers from transport implementation issues such as the reliability of a connection. The transport layer provides mechanisms for: Segmenting upper layer applications The establishment, maintenance, and orderly termination of virtual circuits Information flow control and reliability via TCP. Transport fault detection and recovery The Network Layer : Layer three of the OSI model is the network layer. The network layer creates and sends packets from source network to destination network. Cisco 640-802: Practice Exam “Pass Any Exam. Any Time.” – www.actualtests.com 14 ActualTests.com It provides consistent end-to-end packet delivery services and control information. It creates and uses layer 3 addresses for use in path determination and to forward packets. Incorrect Answers: A: Although the data link layer adds physical (MAC) source and destination addresses, it adds it to a frame, not a segment. C: This correctly describes the physical layer, not the presentation layer
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As part of the five-layer network model used in this textbook, the data link layer sits directly between: a. the physical and the application layers b. the network and the application layers c. the network and transport layers d. the physical and the application layers e. the physical and the network layers
Answer: E
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