CCNA Exam Group Modules 4-7 Questions And Answers 2023

Match the situation with the appropriate use of network media. - backbone cabling in an enterprise, guest access in a coffee shop, horizontal cabling structure, waiting rooms in a hospital, desktop PCs in an enterprise office, long-haul networks - copper cables, fiber optic, wireless - - copper cables: horizontal cabling structure, desktop PCs in an enterprise office - fiber optic: backbone cabling in an enterprise, long-haul networks - wireless: guest access in a coffeeshop, waiting rooms in a hospital 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.) - the amount of traffic that is currently crossing the network - the sophistication of the encapsulation method applied to the data - the type of traffic that is crossing the network - the latency that is created by the number of network devices that the data is crossing - the bandwidth of the WAN connection to the Internet - the reliability of the gigabit Ethernet infrastructure of the backbone - - the type of traffic that is crossing the network - the latency that is created by the number of network devices that the data is crossing - the amount of traffic that is currently crossing the network What are two characteristics of fiber-optic cable? (Choose two.) - It is not affected by EMI or RFI. - Each pair of cables is wrapped in metallic foil. - It combines the technique of cancellation, shielding, and twisting to protect data. - It typically contains 4 pairs of fiber-optic wires. - It is more expensive than UTP cabling is. - - It is not affected by EMI or RFI. - It is more expensive than UTP cabling is. 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 - provide physical addressing to the devices - determine the path packets take through the network - control data access to the media - create the signals that represent the bits in each frame on to the media 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 - the use of braided wire to shield the adjacent wire pairs - the reflection of the electrical wave back from the far end of the cable - the collision caused by two nodes trying to use the media simultaneously - the magnetic field around the adjacent pairs of wire In addition to the cable length, what two factors could interfere with the communication carried over UTP cables? (Choose two.) - crosstalk - bandwidth - size of the network - signal modulation technique - electromagnetic interference - crosstalk, electromagnetic interference twisted cables = what - UTP/STP (shielded/unshielded) Which two devices commonly affect wireless networks? (Choose two.) - Blu-ray players - home theaters - cordless phones - microwaves - incandescent light bulbs - external hard drives - cordless phones, microwaves Which two statements describe the services provided by the data link layer? (Choose two.) - It defines the end-to-end delivery addressing scheme. - It maintains the path between the source and destination devices during the data transmission. - It manages the access of frames to the network media. - It provides reliable delivery through link establishment and flow control. - It ensures that application data will be transmitted according to the prioritization. - It packages various Layer 3 PDUs into a frame format that is compatible with the network interface. - 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. What is the function of the CRC value that is found in the FCS field of a frame? - to verify the integrity of the received frame - to verify the physical address in the frame - to verify the logical address in the frame - to compute the checksum header for the data field in the frame - to verify the integrity of the received frame What is contained in the trailer of a data-link frame? - logical address - physical address - data - error detection - error detection Which statement describes a characteristic of the frame header fields of the data link layer? - They all include the flow control and logical connection fields. - Ethernet frame header fields contain Layer 3 source and destination addresses. - They vary depending on protocols. - They include information on user applications. - They vary depending on protocols 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? - mesh - partial mesh - hub and spoke - point-to-point - partial mesh 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.) - auto-MDIX - CEF - Frame Check Sequence - minimum frame size - source MAC address - Frame Check Sequence minimum frame size Which media communication type does not require media arbitration in the data link layer? - deterministic - half-duplex - full-duplex - controlled access - full-duplex Which statement describes an extended star topology? - End devices connect to a central intermediate device, which in turn connects to other central intermediate devices. - End devices are connected together by a bus and each bus connects to a central intermediate device. - Each end system is connected to its respective neighbor via an intermediate device. - All end and intermediate devices are connected in a chain to each other. - End devices connect to a central intermediate device, which in turn connects to other central intermediate devices What is a characteristic of the LLC sublayer?