EtherType, 802.1Q VLAN tag etc), 3 Media Access.For compatibility reasons, LLC is optional for implementations of IEEE 802.3, but compulsory for implementations of other IEEE 802 physical layer standards. Within the hierarchy of the OSI model and IEEE 802 standards, the MAC sublayer provides a control abstraction of the physical layer such that the complexities of physical link control are invisible to the LLC and upper layers of the network stack. In IEEE 802 LAN/MAN standards, the medium access control (MAC) sublayer (also known as the media access control sublayer) and the logical link control (LLC) sublayer together make up the data link layer.Is the layer that controls the hardware responsible for interaction with the wired. The MAC sublayer and the logical link control sublayer together make up the data link layer. Within the data link layer, the LLC provides flow control and multiplexing for the logical link, while the MAC provides flow control and multiplexing for the transmission medium.Support to extend the IEEE 802.3 protocol and MAC specification to an operating speedof 10 Gb/s.The IP address is the logicalAmong the layers included in the OSI model are: (1) the physical layer (PHY), which specifies the electrical and coding characteristics of the transmission medium (2) the medium access control (MAC) layer, which controls flow of data through the network and (3) the network layer, which sets up CCNA1 v7 – ITNv7 – Modules 4 – 7 Ethernet Concepts Exam Answers 001 Answers Explanation & Hints:Copper Cables – horizontal cabling structure and desktop PCs in offices in an enterpriseFiber optic – backbone cabling in an enterprise and long-haul networksWireless – coffee shops and waiting rooms in a hospital The MAC address is a physical address assigned by the device manufacturer. Encapsulation is adding header and trailer information to a frame. The logical address is an IP address as well as the Layer 3 address. The media access control (MAC) address is a unique address of the network adapter.
the type of traffic that is crossing the network the sophistication of the encapsulation method applied to the data the amount of traffic that is currently crossing the network Which three factors could influence the differences in throughput? (Choose three.) The administrator notices that the network throughput appears lower than the bandwidth expected. What are two characteristics of fiber-optic cable? (Choose two.) These factors include, the amount of traffic, type of traffic, and latency created by the network devices the data has to cross. the reliability of the gigabit Ethernet infrastructure of the backboneThroughput usually does not match the specified bandwidth of physical links due to multiple factors. the bandwidth of the WAN connection to the Internet create the signals that represent the bits in each frame on to the media What is a primary role of the Physical layer in transmitting data on the network? Fiber is immune to EMI and RFI, but costs more, requires more skill to install, and requires more safety precautions. It is more expensive than UTP cabling is.Fiber-optic cabling supports higher bandwidth than UTP for longer distances. It typically contains 4 pairs of fiber-optic wires. It combines the technique of cancellation, shielding, and twisting to protect data. Ieee 802.3 Media Access Control Layer () Is Responsible For What? Series Of SignalsWith the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs? This layer accepts a complete frame from the data link layer and encodes it as a series of signals that are transmitted to the local media. determine the path packets take through the networkThe OSI physical layer provides the means to transport the bits that make up a frame across the network media. Word for mac all my comments are suddenly the wrong colorWhat type of cabling is shown?CCNA1 v7 – ITNv7 – Modules 4 – 7 Ethernet Concepts Exam Answers 01Network cabling include different types of cables:UTP cable consists of four pairs of color-coded wires that have been twisted together and then encased in a flexible plastic sheath.STP cable uses four pairs of wires, each wrapped in a foil shield, which are then wrapped in an overall metallic braid or foil.Coaxial cable uses a copper conductor and a layer of flexible plastic insulation surrounds the copper conductor.Fiber cable is a flexible, extremely thin, transparent strand of glass surrounded by plastic insulation. The produced magnetic field will interface the signal carried in the adjacent wire. When current flows through a wire a magnetic field is produced. the collision caused by two nodes trying to use the media simultaneouslyCrosstalk is a type of noise, or interference that occurs when signal transmission on one wire interferes with another wire. the reflection of the electrical wave back from the far end of the cable the use of braided wire to shield the adjacent wire pairs The electrical pulses are susceptible to interference from two sources:Electromagnetic interference (EMI) or radio frequency interference (RFI) – EMI and RFI signals can distort and corrupt the data signals being carried by copper media.Crosstalk – Crosstalk is a disturbance caused by the electric or magnetic fields of a signal on one wire interfering with the signal in an adjacent wire.CCNA1 v7 – ITNv7 – Modules 4 – 7 Ethernet Concepts Exam Answers 02 Data is transmitted on copper cables as electrical pulses. However, copper media is limited by distance and signal interference. It maintains the path between the source and destination devices during the data transmission. It defines the end-to-end delivery addressing scheme. Which two statements describe the services provided by the data link layer? (Choose two.) LLC forms a frame from the network layer PDU into a format that conforms to the requirements of the network interface and media. It packages various Layer 3 PDUs into a frame format that is compatible with the network interface.The data link layer is divided into two sub layers, namely Logical Link Control (LLC) and Media Access Control (MAC). It ensures that application data will be transmitted according to the prioritization. It provides reliable delivery through link establishment and flow control. What is the function of the CRC value that is found in the FCS field of a frame? It manages the frame access to the network media according to the physical signaling requirements (copper cable, fiber optic, wireless, etc.) The MAC sub layer defines the media access processes performed by the hardware. The source MAC address is not used to determine how the frame is received. Auto-MDIX (automatic medium-dependent interface crossover) is Layer 1 technology that detects cable straight-through or crossover types. 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.)An Ethernet frame is not processed and is discarded if it is smaller than the minimum (64 bytes) or if the calculated frame check sequence (FCS) value does not match the received FCS value. A hub and spoke uses a central device in a star topology that connects to other point-to-point devices. A point-to-point topology is where each device is connected to one other device.
0 Comments
Leave a Reply. |
AuthorAndrew ArchivesCategories |