Question 244 - N10-008 discussion

Jumbo frames are Ethernet frames that have a payload size larger than the standard 1500bytes. They can range from 1501 to 9000 bytes, depending on the network device andconfiguration.Jumbo frames can reduce the overhead of file transfers by decreasing the number of framesthat need to be sent and received, as well as the number of headers and checksums that needto be processed.Jumbo frames can also improve the throughput and efficiency of the network, as they reducethe fragmentation and reassembly of packets, and the CPU utilization of the network devices.However, jumbo frames also have some drawbacks, such as increased latency, higher memoryrequirements, and compatibility issues with some network devices and applications. Therefore,they should be used with caution and only when the network supports them.To enable jumbo frames, both the sender and the receiver, as well as all the intermediatedevices (such as switches and routers) along the path, must support and be configured with thesame maximum transmission unit (MTU) size. Otherwise, the frames will be dropped orfragmented, resulting in poor performance or errors.The other options are not relevant to reducing the overhead of file transfers:Link aggregation is a technique of combining multiple physical links into a logical link, toincrease the bandwidth and redundancy of the network. It does not affect the frame size or theoverhead of file transfers.Port security is a feature that restricts the access to a switch port based on the MAC address ofthe device connected to it. It prevents unauthorized devices from accessing the network, but itdoes not reduce the overhead of file transfers.Flow control is a mechanism that regulates the rate of data transmission between two devices,to avoid congestion and data loss. It can be implemented at the data link layer (using pauseframes) or the transport layer (using TCP windowing). It does not reduce the overhead of filetransfers, but rather adapts to the network conditions.Lower FTP port is not a valid configuration change, as FTP uses well-defined ports for itsoperation. FTP uses port 21 for control connections and port 20 for data connections, or arandom port above 1024 for passive mode. Changing the FTP port would not reduce theoverhead of file transfers, but rather cause connection problems or security risks.Reference:CompTIA Network+ N10-008 Study Guide, Chapter 2: Network Devices and Technologies,Section 2.3: Configure Switches, p. 97-98Professor Messer's Network+ N10-008 Course Notes, Section 2.3: Switch Configuration, p. 22