1 / 17

More TCP/IP Protocols

More TCP/IP Protocols. Chapter 6 Lecture 2. HTTP. Hypertext Transfer Protocol Allows text, graphics, multimedia to be downloaded from an web server HTTP clients = web browsers Uses UDP URL – uniform resource locator HTML – scripting language for web pages. HTTPS.

Download Presentation

More TCP/IP Protocols

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. More TCP/IP Protocols Chapter 6 Lecture 2

  2. HTTP • Hypertext Transfer Protocol • Allows text, graphics, multimedia to be downloaded from an web server • HTTP clients = web browsers • Uses UDP • URL – uniform resource locator • HTML – scripting language for web pages

  3. HTTPS • Hypertext Transfer Protocol Secure • Employs secure socket layers • SSL – an added protocol layer between HTTP and the Transport layer • Encrypts information transmitted between clients (Netscape and Microsoft) and web servers. • Web servers • Apache • Microsoft IIS

  4. Telnet • Terminal emulator • Sessions opened on a remote host • Allows user to access applications and data on the host computer. Use the host for processing. • Authentication required • Uses TCP.

  5. ICMP • Internet Control Message Protocol • Message control and error reporting between host and server • Works with IP • Tracert and Ping are two of the most commonly used ICMP network management tools.

  6. ARP • Address Resolution Protocol • Allows a device that knows a destination’s IP address but doesn’t know the destination’s MAC address to find it.

  7. NTP • Network Time Protocol • Synchronize computer clock times of all computers in the LAN.

  8. Network Services • DHCP/BOOTP • DNS • NAT/ICS • WINS • SNMP

  9. DHCP • Dynamic Host Configuration Protocol • A server is set up with this service to dynamically assign IP addresses to hosts. • Scope – the range of IP addresses from which the DHCP server assigns addresses • Lease – the amount of time which the server assigns IP address to the host • Reservation – an IP address is reserved for a particular host • Not platform dependent

  10. DHCP Advantages & Disadvantages • Eliminates manual configuration for each host • Eliminates duplicate IP addresses (human error) • Eliminates need to reconfigure if the host is moved • Increases traffic (disadvantage) • DHCP server must be installed and configured. (disadvantage)

  11. BOOTP • Older protocol to automatically assign IP addresses to hosts. • DHCP was modeled after BOOTP.

  12. DNS • Domain Name Service • Requires a server configured as a DNS server • Resolves hostnames to IP addresses • Example: www.yorktech.com is 172.16.2.11 • HOST file – contained names and aliases matched to IP addresses – manually configured • DDNS – allows automatic additions of host names to IP addresses • Platform independent

  13. DNS Namespace • Hierarchical structure with logical divisions of domains EDU COM GOV JP Winthrop.edu IBM.COM DOC.gov Google.co.jp

  14. NAT • Network Address Translation • Allows many computers to connect to the Internet through one connection • Static: server configured with an IP address • External IP address(es) may be within the official network IP address • Internal IP addresses used by nodes may be private addresses • Dynamic: server assigns IP addresses from a range to be used by hosts as they request web access

  15. ICS • Windows version of NAT • Lacks security

  16. SNMP • Simple Network Management Protocol • Facilitates network management – it isn’t a network management system (NMS) itself • NMS is a special software • Requires two modes • Manager software • Agent software • Ability to monitor and manage hardware over a WAN

  17. IP Version 6 • Uses 128-bit addresses • Greater number of IP addresses. • Eight octets in Hexadecimal format • Example: 52DF:7E22:63F2:21AA:CBD4:D77e:CC21:554F • Other features • Smaller headers (lower overhead) • Packet labeling (prioritization) • Improved authenticity/security

More Related