lecture 26: wrap-up

COSC301 Lecture 26: Wrap-up 1

COSC 301 Network Management

Lecture 26: Wrap-Up

Haibo Zhang

Computer Science, University of Otago


Topics•  Networking concepts such as OSI, TCP/IP, deamon,

etc.•  File system: soft link, hard link, protection bits, inodes,

superblock, sticky bit, etc.•  System installation: boot procedure, startup scripts,

hard disk, Linux/Unix directories, etc.•  Network daemons/services: inetd, tcpd, crond, klogd,

syslogd, exim, sshd, ftpd•  Principles such as least privilege, tools, and common

sense for system/network administration.•  Scripting skills


Topics (cont.)•  Network devices: router, switch, hub, gateway,

firewall, etc.•  Wireless networking: standards, topologies and

installation.•  DNS and IP address assignments: DHCP•  WWW and Emails•  TLS and SSH•  Network security: authentication protocols, policies,

attack examples, measures.•  Firewall: IP tables, NAT, masquerading, port

forwarding, etc.•  Various interior/exterior routing protocols: RIP, OSPF,

BGP, eBGP, iBGP


Topics (cont.)•  IP accounting and traffic measurement•  Management protocols and tools: SNMP•  Methods for fault diagnosis


General •  Emphasize understanding, rather than memorizing in

final examination!•  Write in the space provided. •  No calculators •  No books, notes, or other material. •  3 hour exam

You need to get >40% to pass the paper!


Question templates (cont.)•  Explain why it is necessary for a hard disk to be

partitioned. (4 marks)•  Answer:

–  (2 marks) for installation of different OS, easy for system upgrade

–  (2 marks) to separate different file systems, easy for maintenance of file systems and good for protection among different files systems.


Question templates (cont.)•  List the pros and cons of …•  Give two benefits of …•  Given a situation, explain why or why not?•  Get a copy of past exams from the library.•  Almost one question per lecture, usually the issues

discussed in more details will be examined.


Where to go from here?•  TELE402

– UNIX/Linux network programming API•  Socket API

– Make robust, high performance Internet applications– Wireless sensor networks– Advanced networking technologies:

•  Datacenter networking•  5G networks•  On-chip networks•  Li-Fi•  Internet of things

–  http://www.cs.otago.ac.nz/tele402

Introduction of LiFi§ Disadvantages

Ø Li-Fi doesn’t work in the darkØ cannot move to other rooms unless there are

wired bulbs tooØ low-mobilityØ small-coverage

• Jan. 2013, Intel announced the use of a silicon photonic architecture to define the next generation of servers

• Apr. 2013, Intel demonstrated its first inexpensive optical chip

• In 2015, IBM to demonstrate first on-package silicon photonics", Mar 2015

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Challenging Problems


Where to go from here?•  COSC440

– Linux kernel programming– Understand some source code of Unix version 6– Research articles on OS, 100% internal assessment.–  http://www.cs.otago.ac.nz/cosc440

lecture 26: wrap-up

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