1 / 13

Networking

Networking. SPARCS 2000 wheel seminar netj@sparcs.kaist.ac.kr. TCP/IP. Low-level networking software most commonly used with UNIX Internet Protocol Internet Control Message Protocol Address Resolution Protocol User Datagram Protocol. TCP/IP network model. Link layer

mercer
Download Presentation

Networking

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. Networking SPARCS 2000 wheel seminar netj@sparcs.kaist.ac.kr

  2. TCP/IP • Low-level networking software most commonly used with UNIX • Internet Protocol • Internet Control Message Protocol • Address Resolution Protocol • User Datagram Protocol

  3. TCP/IP network model • Link layer • Network hardware, device drivers • Network layer • Basic comm., addressing, routing • Transport layer • Comm. Among net programs • Application layer • Application programs

  4. Addresses • Hardware address • IP Address • IP: xxx.xxx.xxx.xxx, 4bytes • Port: TCP/UDP, 2bytes • Internet address classes (A,B,C,D,E)

  5. ARP • Address Resolution Protocol • Does address translation • IP  Hardware Address • arp command • RARP, BOOTP

  6. Routing • Process directing a packet through networks between its source and destination • RIP, OSPF, IGRP, EGP, BGP, DVMRP • ICMP redirects • CIDR (Classless Inter-Domain Routing) • route command • routed, gated

  7. Network commands • ifconfig: configuring network interfaces • route: configure static routes • ping: check if a host is alive • netstat: network status • traceroute: trace IP packets • tcpdump, etherfind, snoop, arp

  8. DNS • Domain Name System • Hostnames  IP addresses • Distributed database that holds info about computers on the Internet • BIND, named

  9. DNS defines, • Hierarchical namespace for hosts • Host table as a distributed database • Library routines for querying • Improved routing for email • Protocol for exchanging naming information

  10. DNS Namespace • Top-level domains • COM, EDU, NET, ORG, GOV … • Country codes • KR, JP, CA, UK … • Root domain . • Subdomains • sparcs.kaist.ac.kr, www.kaist.ac.kr

  11. DNS Architecture • IP  Domain Name • Reversed query • 143.248.234.102  102.234.248.143.IN-ADDR.ARPA.  sparcs.kaist.ac.kr • Domain Name  IP • Querying sparcs.kaist.ac.kr.  kr.  ac.kr.  kaist.ac.kr.  sparcs.kaist.ac.kr.

  12. NFS • Network File System • Share file systems among computers over network • mountd: mount responder • nfsd: serve files • biod: client-side caching • automount

  13. NIS • Network Information Service • Sharing system files • rdist: push files • expect: pull files • yp commands • NIS+

More Related