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ccna 200 301 bookshelves ikea wall.Distinguish between the DoD and OSI network models. The DoD model is a condensed version of the OSI model, consisting of four layers instead of seven, and although it is not discreetly identical to the OSI model, it can also be used to describe the packet creation process, and devices and protocols can correspond one-to-one to each layer.Recognizing process/application layer protocols. Telnet is a terminal emulation program that you can use to log on to a remote host and run programs. FTP (File Transfer Protocol) provides connection-oriented services that you can use to transfer files. TFTP (Simple File Transfer Protocol) is a connectionless file transfer program. SMTP (Simple Mail Transfer Protocol) is the program that sends e-mail.Get to know host-to-host layer protocols. TCP (Transmission Control Protocol) is a connection-oriented protocol that provides reliable network services through an acknowledgement mechanism and flow control mechanism. UDP (User Datagram Protocol) is a connectionless protocol that provides low-overhead but unreliable service.Recognize the interconnected network layer protocols. IP (Interconnection Network Protocol) is a connectionless protocol that provides network addressing and routing functions in an interconnected network. ARP (Address Resolution Protocol) looks up hardware addresses through known IP addresses. RARP (Reverse Address Resolution Protocol) looks up an IP address from a known hardware address. ICMP (Interconnection Control Message Protocol) provides connectivity diagnostics and provides destination unreachability messages.Describes the functions of DNS and DHCP in a network. DHCP (Dynamic Host Configuration Protocol) provides network configuration information (including IP addresses) to hosts, eliminating the need for administrators to perform these configuration tasks manually. DNS (Domain Name Service) is responsible for resolving host names, including two types of names: Internet addresses such as www.lammle.com, Workstation - to IP addresses, so that users do not need to be informed of the IP address of a device when they want to connect to it.In connection-oriented transfers, indicate the fields contained in the TCP header. TCP header fields include: source port, destination port, sequence number, acknowledgment number, header length, reserved field, flag field, window size, checksum, emergency pointer, optional field, and data field.In a connectionless transport, indicate the fields contained in the UDP header oUDP header fields include: source port, destination port, length, checksum, and data. Compared to TCP headers, the UDP header fields are significantly smaller, but it does not provide as many advanced features as TCP.Indicate the fields contained in the IP header host. The IP header fields include: version number, header length, priority or service type, total length, identifier, flag, slice offset, time to live, protocol, header checksum, source IP address, destination IP address, options, and data.Describe the commonalities and differences between UDP and TCP in terms of features and characteristics. TCP is connection-oriented, with acknowledgement127