Accounting Information System
Accounting Information System II
Chapter 12 – Electronic Commerce Systems
REVIEW QUESTIONS 1. What is a VPN? * A VPN (virtual private network) is a private network that exists within a public network.
2. Name the 3 types of addresses used on the internet. * The Internet uses three types of addresses for communications: * (1) email addresses, * (2) Web site (URL) addresses, and * (3) the addresses of individual computers attached to network (IP address).
3. Describe the elements of an e-mail address.
The format for an email address is USER NAME @ DOMAIN NAME. For example, the address of the author of this textbook is jah0@lehigh.edu There are no spaces between any of the letters. The user name (or in this case user ID) is jah0. A domain name is an organization’s unique name combined with a top-level domain (TLD) name. In the example above, the unique name is “Lehigh” and the TLD is “edu.”
4. Networks would be inoperable without protocols. Explain their importance and what functions they perform. * Network protocols are the rules and standards governing the design of hardware and software that permit users of networks manufactured by different vendors to communicate and share data. Without protocols, data transmission between two incompatible systems would be impossible. Protocols facilitate the physical connection between the network devices. Protocols also synchronize the transfer of data between physical devices. They provide a basis for error checking and measuring network performance. They promote compatibility among network devices. Lastly, they promote network designs that are flexible, expandable, and cost-effective.
5. How do HTTP and HTTP-NG differ? * HTTP (Hypertext Transfer Protocol) controls Web browsers that access the Web. When the user clicks on a link to a Web page, a connection is established, the Web page is displayed, then the connection is broken. * HTTP-NG is the new generation of
Chapter 12 – Electronic Commerce Systems
REVIEW QUESTIONS 1. What is a VPN? * A VPN (virtual private network) is a private network that exists within a public network.
2. Name the 3 types of addresses used on the internet. * The Internet uses three types of addresses for communications: * (1) email addresses, * (2) Web site (URL) addresses, and * (3) the addresses of individual computers attached to network (IP address).
3. Describe the elements of an e-mail address.
The format for an email address is USER NAME @ DOMAIN NAME. For example, the address of the author of this textbook is jah0@lehigh.edu There are no spaces between any of the letters. The user name (or in this case user ID) is jah0. A domain name is an organization’s unique name combined with a top-level domain (TLD) name. In the example above, the unique name is “Lehigh” and the TLD is “edu.”
4. Networks would be inoperable without protocols. Explain their importance and what functions they perform. * Network protocols are the rules and standards governing the design of hardware and software that permit users of networks manufactured by different vendors to communicate and share data. Without protocols, data transmission between two incompatible systems would be impossible. Protocols facilitate the physical connection between the network devices. Protocols also synchronize the transfer of data between physical devices. They provide a basis for error checking and measuring network performance. They promote compatibility among network devices. Lastly, they promote network designs that are flexible, expandable, and cost-effective.
5. How do HTTP and HTTP-NG differ? * HTTP (Hypertext Transfer Protocol) controls Web browsers that access the Web. When the user clicks on a link to a Web page, a connection is established, the Web page is displayed, then the connection is broken. * HTTP-NG is the new generation of