CCNA Exam Group Modules 4-7(2023)verified

CCNA Exam Group Modules 4-7(2023)verifiedMatch 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? - It provides the logical addressing required that identifies the device. - It provides delimitation of data according to the physical signaling requirements of the medium. - It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media. - It defines software processes that provide services to the physical layer. It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media. What are three ways that media access control is used in networking? (Choose three.) - Ethernet utilizes CSMA/CD. - Media access control provides placement of data frames onto the media. - Contention-based access is also known as deterministic. - 802.11 utilizes CSMA/CD. - Data link layer protocols define the rules for access to different media. - Networks with controlled access have reduced performance due to data collisions. Data link layer protocols define the rules for access to different media Ethernet utilizes CSMA/CD. Media access control provides placement of data frames onto the media. During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network? - An IP address is added. - The logical address is added. - The physical address is added. - The process port number is added. The physical address is added. What three items are contained in an Ethernet header and trailer? (Choose three.) - source IP address - source MAC address - destination IP address - destination MAC address - error-checking information source MAC address, destination MAC address, error-checking information What type of communication rule would best describe CSMA/CD? - access method - flow control - message encapsulation - message encoding access method Which three basic parts are common to all frame types supported by the data link layer? (Choose three.) - header - type field - MTU size - data - trailer - CRC value header, data, trailer Which statement is true about the CSMA/CD access method that is used in Ethernet? - When a device hears a carrier signal and transmits, a collision cannot occur. - A jamming signal causes only devices that caused the collision to execute a backoff algorithm. - All network devices must listen before transmitting. - Devices involved in a collision get priority to transmit after the backoff period. All network devices must listen before transmitting What is the auto-MDIX feature on a switch? - the automatic configuration of an interface for 10/100/1000 Mb/s operation - the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection - the automatic configuration of full-duplex operation over a single Ethernet copper or optical cable - the ability to turn a switch interface on or off accordingly if an active connection is detected the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection 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-AA - 00-60-2F-3A-07-BB - 00-60-2F-3A-07-CC - 00-60-2F-3A-07-DD 00-60-2F-3A-07-CC 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 for this task? - port-based buffering - level 1 cache buffering - shared memory buffering - fixed configuration buffering shared memory buffering What are two examples of the cut-through switching method? (Choose two.) - store-and-forward switching - fast-forward switching - CRC switching - fragment-free switching - QOS switching fast-forward switching, fragment-free switching Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame? - cut-through switching - store-and-forward switching - fragment-free switching - fast-forward switching store-and-forward switching What is the purpose of the FCS field in a frame? - to obtain the MAC address of the sending node - to verify the logical address of the sending node - to compute the CRC header for the data field - to determine if errors occurred in the transmission and reception to determine if errors occurred in the transmission and reception Which switching method has the lowest level of latency? - cut-through - store-and-forward - fragment-free - fast-forward fast-forward 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.) - The link between the switches will work at the fastest speed that is supported by both switches. - The link between switches will work as full-duplex. - If both switches support different speeds, they will each work at their own fastest speed. - The auto-MDIX feature will configure the interfaces eliminating the need for a crossover cable. - The connection will not be possible unless the administrator changes the cable to a crossover cable. - The duplex capability has to be manually configured because it cannot be negotiated. - The link between the switches will work at the fastest speed that is supported by both switches. - The link between switches will work as full-duplex. - The auto-MDIX feature will configure the interfaces eliminating the need for a crossover cable. Which advantage does the store-and-forward switching method have compared with the cut-through switching method? - collision detecting - frame error checking - faster frame forwarding - frame forwarding using IPv4 Layer 3 and 4 information frame error checking When the store-and-forward method of switching is in use, what part of the Ethernet frame is used to perform an error check? - CRC in the trailer - source MAC address in the header - destination MAC address in the header - protocol type in the header CRC in the trailer Which switching method uses the CRC value in a frame? - cut-through - fast-forward - fragment-free - store-and-forward store-forward What are two actions performed by a Cisco switch? (Choose two.) - building a routing table that is based on the first IP address in the frame header - using the source MAC addresses of frames to build and maintain a MAC address table - forwarding frames with unknown destination IP addresses to the default gateway - utilizing the MAC address table to forward frames via the destination MAC address - examining the destination MAC address to add new entries to the MAC address table using the source MAC addresses of frames to build and maintain a MAC address table utilizing the MAC address table to forward frames via the destination MAC address Which two statements describe features or functions of the logical link control sublayer in Ethernet standards? (Choose two.) - Logical link control is implemented in software. - Logical link control is specified in the IEEE 802.3 standard. - The LLC sublayer adds a header and a trailer to the data. - The data link layer uses LLC to communicate with the upper layers of the protocol suite. - The LLC sublayer is responsible for the placement and retrieval of frames on and off the media. The data link layer uses LLC to communicate with the upper layers of the protocol suite. Logical link control is implemented in software. What is the auto-MDIX feature? - It enables a device to automatically configure an interface to use a straight-through or a crossover cable. - It enables a device to automatically configure the duplex settings of a segment. - It enables a device to automatically configure the speed of its interface. - It enables a switch to dynamically select the forwarding method. It enables a device to automatically configure an interface to use a straight-through or a crossover cable. What is one advantage of using the cut-through switching method instead of the store-and-forward switching method? - has a positive impact on bandwidth by dropping most of the invalid frames - makes a fast forwarding decision based on the source MAC address of the frame - has a lower latency appropriate for high-performance computing applications​ - provides the flexibility to support any mix of Ethernet speeds has a lower latency appropriate for high-performance computing applications​ Which is a multicast MAC address? - FF-FF-FF-FF-FF-FF - 5C-26-0A-4B-19-3E - 01-00-5E-00-00-03 - 00-26-0F-4B-00-3E 01-00-5E-00-00-03