Monday, September 29, 2008

CISCO: Basic Routing Configuration w/ Description

ROUTING CONFIGURATION

Would you like to enter configuration mode? N

Router> enable

- user-exec mode

Router# config t

- priviledged-exec mode

Router(config)#

- global configuration mode

Router(config)# hostname RTA

- rename/change router hostname

RTA(config)#banner motd #Authorized User Only! #

- banner

RTA(config)# line console 0

- set console password

RTA(config-line)# password RTAcon

RTA(config-line)# login

RTA(config)# line vty 0 4

- set telnet password

RTA(config)# password RTAtel

RTA(config)# login

RTA(config)# enable password RTApass

RTA(config)# enable secret RTAsec

RTA(config)# service password-encryption

CONFIGURATION INTERFACES

RTA(config)# interface s0/0

RTA(config)# ip add --IP-- --SM--

RTA(config)# clock rate 64000

- clocking for DCE only

RTA(config)#no shutdown

- to turn on int

SAVE CONFIGURATION

RTA# copy running-config startip-config

or

RTA# copy run start

or

RTA# wr

CISCO: Sample of basic configurationg of router

Router> enable
Router# configure terminal
Router(config)# hostname Zid>
Zid(config)# enable secret
Zid(config)# line vty 0 4
Zid(config-line)# password
Zid(config-line)# login
Zid(config-line)# line console 0
Zid(config-line)# password
Zid(config-line)# login
Zid(config-line)# exit
Zid(config)# interface fastethernet0/0
Zid(config-if)# ip address _ _ _._ _ _._ _ _._ _ _ _ _ _._ _ _._ _ _._ _ _
Zid(config-if)# no shutdown
Zid(config-if)# interface serial0/0/0
Zid(config-if)# ip address _ _ _._ _ _._ _ _._ _ _ _ _ _._ _ _._ _ _._ _ _
Zid(config-if)# clock rate 64000 (if DCE)
Zid(config-if)# no shutdown
Zid(config-if)# exit
Zid(config)# router rip
Zid(config-router)# network
Zid(config-router)# network
Zid(config-router)# exit
Zid(config)# exit
Zid#

Saturday, June 14, 2008

Limitations of a Computer

The computer can outperform human beings in speed, memory and accuracy but still the computer has limitations. There are following limitations of a computer.

· Programmed by human:

Though computer is programmed to work efficiently, fast and accurately but it is programmed by human beings to do so. Without a program, computer is nothing. A program is a set of instructions. Computer only follows these instructions. If the instructions are not accurate the working of computer will not accurate.

· Thinking:

The computer can not think itself. The concept of artificial intelligence shows that the computer can think. But still this concept is dependent on set of instructions provided by the human beings.

· Self Care:

A Computer can not care itself like a human. A computer is dependent still to human beings for this purpose.

· Retrieval of memory:

A computer can retrieve data very fast but this technique is linear. A human being’s mind does not follow this rule. A human mind can think randomly which a computer machine can not.

· Feelings:

One of the main limits in the computer is of feeling. A computer can not feel about some like a human. A computer can not meet human in respect of relations. Human can feel, think and caring but a computer machine itself can not. A computer can not take place of human because computer is always dependent of human.