ccna 200-301 network simulator tools today fly cutter

ccna 200-301 network simulator tools today fly cutter.Make address Logical address - IP Physical address - MACBroadcast Blocking ForwardingSecurity Higher Lower2.3.4 Transport Layer ...The TransportLayer is the key part of the entire network, (End-to-End) implements end-to-end and other reliable communication between two user processes, handles packet errors, packet order, and downwards provides the highest layer of communication services, some key transmission issues. Bridging the differences and shortcomings of the communication subnetwork, the data link layer has similarities and differences in that the former upwards is the lowest layer of user functions. With the latter being the latter being end-to-end, link layer protocols are much more complex. Point to point and is much more complex than the dataThe main functions of the transport layer are to provide the establishment, maintenance and removal of transport layer connections, to provide appropriate services to the network layer, to provide end-to-end error recovery and traffic control, to provide transport services to the session layer independent of the network layer and to provide reliable and transparent data transmission.The protocols associated with the transport layer are TCP (TransmissionControl Protocol, Transmission Control Protocol), UDP (User DatagramProtocol, User Datagram Protocol), which relate to the port number used by the service, and the host identifies the service based on the port number (the common port number for WWW services is 80, Telnet The host identifies a service by its port number (the common WWW service port number is 80, Telnet service port number is 23, etc.) and distinguishes between sessions (source IP, source port number, destination IP, destination port number, all four together uniquely identify a session). o For some common services, the service name, protocol used (TCP or UDP), default port number, etc.Here is a way to identify the service ports used by different applications, for example, to check the service port used by the "Remote Desktop" service in Windows. If you are on computer "10.0.248.137" and log in to computer "210.28.203.187" using Remote Desktop, then execute unetstat -nw on the remote computer you are controlling (of course, you can also do this on the local computer). As shown in Figure 236, you can see that the remote host is using port "3389", which is the default port used by Windows Remote Desktop. In a similar way, you can find out what other applications use\24port number.