File Transfer Protocol (FTP) is used to transfer text files, programs, spreadsheets, and databases across the Internet. TELNET is a terminal emulation protocol used on TCP/IP-based networks. It allows users to run programs and review data from a remote terminal or computer. TELNET is an inherent part of the TCP/IP communications protocol. While both protocols deal with data transfer, FTP is useful for perusing a file of data as if the user were actually at the remote site. 2) What purpose do protocols serve?
Protocols serve network functions in several ways:
First, they facilitate the physical connection between the network devices. Through protocols, devices are able to identify themselves to other devices as legitimate network entities and initiate (or terminate) a communication session. Second, protocols synchronize the transfer of data between physical devices. This involves defining the rules for initiating a message, determining the data transfer rate between devices, and acknowledging message receipt. Third, protocols provide a basis for error checking and measuring network performance. This is done by comparing measured results against expectations. For example, performance measures pertaining to storage access times, data transmission rates and modulation frequencies are critical to control the network’s function. Thus, the identification and correction of errors depend on protocol standards that define acceptable performance. Fourth, protocols promote compatibility among network devices. To transmit and receive data successfully, the various devices involved in a particular session must conform to a mutually acceptable mode of operation, such as synchronous and duplex, or half duplex. Without protocols to provide such conformity, messages sent between devices would be distorted and garbled. Finally, protocols promote network designs that are flexible, expandable, and cost-effective. Users are free to change and enhance their systems by selecting from the best offerings of a variety of vendors. Manufactures must, of course, construct these products in accordance with established protocols. 3) Explain the purpose of the two elements of TCP/IP.
The TCP portion of the protocol ensures that the total number of data bytes transmitted was received. The IP component provides the routing mechanism. Every server and computer in a TCP/IP network requires an IP address, which is either permanently assigned or dynamically assigned at start-up. The IP part of the TCP/IP protocol contains a network address that is used to route messages to different networks.
4) Discuss the three levels of Internet business models.
There are 3 levels of Internet Business Models which are information level, transaction level and distribution level. At the information level of activity, an organization uses the internet to display information about the company, its products, services, and business policies. This level involves little more than creating a Web site, and it is the first step taken by most firms entering the Internet marketplace. When customers access the Website, they generally first visit the home page. This is an index to the site’s contents through other web pages. Large organizations often create and manage their Websites internally. Smaller companies have their sites hosted on servers that an ISP maintains to be successful at this level, the organization must ensure that: a) Information displayed on the website is current, complete and accurate b) Customers can find the site successfully navigate through it c) An adequate hardware and software infrastructure exists to facilitate quick access during high usage periods d) Only authorized users access information on the site
At the second level which is the transaction level, organizations involved use the Internet to accept orders from customers and/or to place them with their suppliers. This...