1. CITA 310 Section 3 Additional Topics

2. Common IPv4 Classes ClassFirst numberSubnet maskNumber of networks Number of addresses Class A0 – 127255.0.0.012816,777,216 Class B128 – 191255.255.0.016,38465,536 Class C192 – 223255.255.255.02,097,152256

3. Network Address Translation (NAT) NAT allows an IP address from one network to be translated into another address on an internal network You can also use NAT to translate a single IP address valid on the Internet into multiple internal addresses Useful if your ISP gives you a single IP address, yet you have multiple servers and users on the internal network

4. Private IPv4 Address Spaces Block SizeLeading Number(s) Subnet maskNumber of networks 24-bit10255.0.0.01 Class A 20-bit172.16 - 172.31255.240.0.016 Class B 16-bit192.168255.255.0.01 Class B

5. Understanding Web server Administration Web server administrators focus on the Internet and the Web Need to work with ISPs and Web page developers Typically, a Web server provides information to anyone who requests it over the Internet Web servers can contain other applications such as FTP and e-mail

6. Understanding Web server Administration Depending on the size of the organization, some tasks may be delegated Web page development Database design Programming E-mail administration Security

7. Web Hosting Solutions Standard Your site resides on the same computer with many other sites Dedicated You have a server that only you use Co-location Your own server is physically located at the company that does your Web hosting Cloud Based on clustered load-balanced servers