1. A Practical Guide to Fedora and Red Hat Enterprise Linux Unit 7: Linux Network Services Chapter 10: Networking and the Internet By Fred R. McClurg Linux Operating System © Copyright 2013, All Rights Reserved

2. Modern Web Browsers Mozilla: ◦ Firefox (Web Browser) ◦ Thunderbird (Email Client) Opera (Mobile Browser) Safari (MacOS) Konqueror (KDE File Manager & Browser) Chrome (Google) Lynx (Text Only) Internet Explorer (Windows)

3. Network Terminology Internet: Network of networks that links computers around the world Intranet: A network to connect computing resources that are typically restricted to internal users. Firewall: Prevents certain types of traffic from entering or leaving the network. Transmission Control Protocol and Internet Protocol (TCP/IP): The predominant network protocol used by Linux systems.

4. Network Types Broadcast Networks: Many systems sending data at a time. ◦ Cable Modem Point to Point: Only two end points are involved. ◦ Dial Up ◦ DSL ◦ T-1 ◦ T-3 ◦ ISDN

5. Network Terminology Local Area Network (LAN): A network confined to a relatively small area like a computer facility, building or campus. Wide Area Network (WAN): A network that covers a large geographic area and is often used to interconnect LANs. Wireless Network: Allows multiple users access to a point to point connection via a radio frequency.

6. Network Hardware Hub: Broadcasts every packet to every port. Switch: A type of intelligent hub that sorts packets and sends traffic only to the machine it is intended for.

7. IP Addresses IP Address: The unique address by which each computer on the network is identified. Example (IPv4): ◦ 192.168.1.4 ◦ 256 4 = 4,294,967,296 Example (IPv6): ◦ fe80::3176:89b3:d62f:e05b%11 ◦ (16 4 ) 8 = 10 36 (340 undecillion)

8. Remote System Login telnet : Protocol for remote login to Unix and non-Unix systems. ftp : File Transfer Protocol ◦ Method for downloading and uploading files to another system using TCP/IP.

9. Testing Network Connection ping : Send a packet to a remote computer. traceroute : Traces the route a packet follows to its destination.

10. Trusted Systems rcp : Remote Copy ◦ Allows a “trusted” system to copy a file to another “trusted” system. rsh : Remote Shell ◦ Allows a user to login from one “trusted” system to another “trusted” system.