Saturday, October 22, 2011

NETWORKING-BASIC CONFIGURATION




        --- System Configuration Dialog ---

Continue with configuration dialog? [yes/no]: n


Press RETURN to get started!



Router>enable ?
  <0-15>  Enable level
  view    Set into the existing view
  <cr>
Router>enable
Router#
Router#clock ?
  set  Set the time and date
Router#clock set ?
  hh:mm:ss  Current Time
Router#clock set 12:15:45 ?
  <1-31>  Day of the month
  MONTH   Month of the year
Router#clock set 12:15:45 12 October ?
  <1993-2035>  Year
Router#clock set 12:15:45 12 October 2011 ?
  <cr>
Router#clock set 12:15:45 12 October 2011
Router#
Router#configure terminal ?
  <cr>
Router#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#hostname ?
  WORD  This system's network name
Router(config)#hostname R1 ?
  <cr>
Router(config)#hostname R1
R1(config)#
R1(config)#interface ?
  Ethernet         IEEE 802.3
  FastEthernet     FastEthernet IEEE 802.3
  GigabitEthernet  GigabitEthernet IEEE 802.3z
  Loopback         Loopback interface
  Serial           Serial
  Tunnel           Tunnel interface
  Vlan             Catalyst Vlans
  range            interface range command
R1(config)#interface fastethernet ?
  <0-9>  FastEthernet interface number
R1(config)#interface fastethernet 0/0 ?
  <cr>
R1(config)#interface fastethernet 0/0
R1(config-if)#
R1(config-if)#ip ?
  access-group        Specify access control for packets
  address             Set the IP address of an interface
  hello-interval      Configures IP-EIGRP hello interval
  helper-address      Specify a destination address for UDP broadcasts
  inspect             Apply inspect name
  ips                 Create IPS rule
  mtu                 Set IP Maximum Transmission Unit
  nat                 NAT interface commands
  ospf                OSPF interface commands
  split-horizon       Perform split horizon
  summary-address     Perform address summarization
  virtual-reassembly  Virtual Reassembly
R1(config-if)#ip address ?
  A.B.C.D  IP address
  dhcp     IP Address negotiated via DHCP
R1(config-if)#ip address 10.1.1.1 ?
  A.B.C.D  IP subnet mask
R1(config-if)#ip address 10.1.1.1 255.255.255.0 ?
  <cr>
R1(config-if)#ip address 10.1.1.1 255.255.255.0
R1(config-if)#
R1(config-if)#no shutdown ?
  <cr>
R1(config-if)#no shutdown

R1(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
R1(config-if)#
R1(config-if)#exit ?
  <cr>
R1(config-if)#exit
R1(config)#
R1(config)#line ?
  <0-81>   First Line number
  console  Primary terminal line
  vty      Virtual terminal
R1(config)#line console ?
  <0-0>  First Line number
R1(config)#line console 0 ?
  <cr>
R1(config)#line console 0
R1(config-line)#password ?
  7     Specifies a HIDDEN password will follow
  LINE  The UNENCRYPTED (cleartext) line password
R1(config-line)#password cisco ?
  <cr>
R1(config-line)#password cisco
R1(config-line)#
R1(config-line)#login ?
  authentication  authenticate using aaa method list
  local           Local password checking
  <cr>
R1(config-line)#login
R1(config-line)#
R1(config-line)#exec-timeout ?
  <0-35791>  Timeout in minutes
R1(config-line)#exec-timeout 0 ?
  <0-2147483>  Timeout in seconds
  <cr>
R1(config-line)#exec-timeout 0 0 ?
  <cr>
R1(config-line)#exec-timeout 0 0
R1(config-line)#
R1(config-line)#logging ?
  synchronous   Synchronized message output
R1(config-line)#logging synchronous ?
  <cr>
R1(config-line)#logging synchronous
R1(config-line)#
R1(config-line)#exit ?
  <cr>
R1(config-line)#exit
R1(config)#
R1(config)#enable ?
  password  Assign the privileged level password
  secret    Assign the privileged level secret
R1(config)#enable password ?
  7      Specifies a HIDDEN password will follow
  LINE   The UNENCRYPTED (cleartext) 'enable' password
  level  Set exec level password
R1(config)#enable password abc ?
  <cr>
R1(config)#enable password abc
R1(config)#
R1(config)#exit ?
  <cr>
R1(config)#exit
R1#
%SYS-5-CONFIG_I: Configured from console by console
R1#
R1#copy run startup ?
  <cr>
R1#copy run startup
Destination filename [startup-config]?
Building configuration...
[OK]
R1#
R1#show start                                                              //_  _  _  _  _  _  _//
R1#
R1#show startup-config ?
  <cr>
R1#show startup-config                                                //_  _  _  _  _  _  _//
R1#
R1#configure terminal ?
  <cr>
R1#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#enable ?
  password  Assign the privileged level password
  secret    Assign the privileged level secret
R1(config)#enable secret ?
  0      Specifies an UNENCRYPTED password will follow
  5      Specifies an ENCRYPTED secret will follow
  LINE   The UNENCRYPTED (cleartext) 'enable' secret
  level  Set exec level password
R1(config)#enable secret xyz ?
  <cr>
R1(config)#enable secret xyz
R1(config)#
R1(config)#service ?
  nagle                Enable Nagle's congestion control algorithm
  password-encryption  Encrypt system passwords
  timestamps           Timestamp debug/log messages
R1(config)#service password-encryption ?
  <cr>
R1(config)#service password-encryption
R1(config)#
R1(config)#line ?
  <0-81>   First Line number
  console  Primary terminal line
  vty      Virtual terminal
R1(config)#line vty ?
  <0-15>  First Line number
R1(config)#line vty 0 15 ?
  <cr>
R1(config)#line vty 0 15
R1(config-line)#
R1(config-line)#exit ?
  <cr>
R1(config-line)#exit
R1(config)#
R1(config)#exit ?
  <cr>
R1(config)#exit
R1#
%SYS-5-CONFIG_I: Configured from console by console
R1#
R1#logout ?
  <cr>
R1#logout









R1 con0 is now available






Press RETURN to get started.













User Access Verification

Password:                                                                    //cisco

R1>
R1>enable ?
  <0-15>  Enable level
  view    Set into the existing view
  <cr>
R1>enable
Password:                                                                    //xyz
R1#
R1#show run ?
  <cr>
R1#show run
Building configuration...

Current configuration : 832 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
service password-encryption
!
hostname R1
!
!
!
enable secret 5 $1$mERr$cKq9Gr5GyPyEKnmQ/jY4f0
enable password 7 08204E4D
!
!
!
!
!
!
!
!
ip name-server 0.0.0.0
!
!
!
!
!
!
interface FastEthernet0/0
 ip address 10.1.1.1 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial1/0
 no ip address
 shutdown
!
interface Serial1/1
 no ip address
 shutdown
!
interface Serial1/2
 no ip address
 shutdown
!
interface Serial1/3
 no ip address
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
!
!
!
!
!
!
!
!
line con 0
 exec-timeout 0 0
 password 7 0822455D0A16
 logging synchronous
 login
line vty 0 4
 login
line vty 5 15
 login
!
!
!
end


R1#

Thursday, October 13, 2011

NETWORKING-SUBNETTING

Hi guys.
I recently joined computer networking course name as CCNA.
This are some imp notes.


NETWORKING

IP has 32 bit long code of 4 segments.
Each segment of 8 bits.

First we should know that

TABLE=1
1000 0000=128
1100 0000=192
1110 0000=224
1111 0000=240
1111 1000=248
1111 1100=252
1111 1110=254
1111 1111=255

Presentation of IP according to network and host potion as follows:

192.168.10.0            /24

In above example /24 represents 24 bits present in network portion and remaining
32-24=8 bits in host portion.

CLASS –C

Now 192.168.10.0     /27     represents 27-24=3 bits of host portion converted to network portion.
So n=3
And h=(total bits in host portion-n)
          =8-3
          =5

Now subnet mask for class c examples will be 255.255.255.0 for network portion by default.
The last 0 represents 0000 0000.
Now from host portion we took 3 bits to network portion.
So 1110 0000 =>224

Therefore subnet mask will be 255.255.255.224

No. of subnet=2^n
                      =2^3
                      =8
No. of host/subnet=(2^h)-2
                             =(2^5)-2
                             =30
Block size=256-(host portion of subnet mask)
                 =256-224
                 =32

Subnet 1=>192.168.10.0
Host range=192.168.10.1-192.168.10.30
Broad cast=192.168.10.31
Subnet 2=>192.168.10.32
Host range=192.168.10.33-192.168.10.62
Broadcast=192.168.10.63
Subnet 3=>192.168.10.64
And so on.

CLASS B

Now 172.16.0.0     /17     represents 17-16=1 bits of host portion converted to network portion.
So n=1
And h=(total bits in host portion-n)
          =16-1
          =15

Now subnet mask for class b examples will be 255.255.0.0 for network portion by default.
The 0 represents 0000 0000.
Now from host portion we took 1 bit to network portion.
So 1000 0000 =>128

Therefore subnet mask will be 255.255.128.0

No. of subnet=2^n
                      =2^1
                      =2
No. of host/subnet=(2^h)-2
                             =(2^15)-2
                             =32766
Block size=256-(host portion of subnet mask)
                 =256-128
                 =128


Subnet 1=>172.16.0.0
Host range=172.16.0.1-172.16.127.254
Broad cast=172.16.127.255
Subnet 2=>172.16.128.0
Host range=172.16.128.1-172.16.255.254
Broadcast=172.16.255.255
And so on.


CLASS A

Now 10.0.0.0     /10     represents 10-8=2 bits of host portion converted to network portion.
So n=2
And h=(total bits in host portion-n)
          =24-2
          =22

Now subnet mask for class a examples will be 255.0.0.0 for network portion by default.
The 0 represents 0000 0000.
Now from host portion we took 1 bit to network portion.
So 1100 0000 =>192

Therefore subnet mask will be 255.192.0.0

No. of subnet=2^n
                      =2^2
                      =4
No. of host/subnet=(2^h)-2
                             =(2^22)-2
                             =4194302
Block size=256-(host portion of subnet mask)
                 =256-192
                 =64


Subnet 1=>10.0.0.0
Host range=10.0.0.1-10.63.255.254
Broad cast=10.63.255.255
Subnet 2=>10.64.0.0
Host range=10.64.0.1-10.127.255.254
Broadcast=10.127.255.255
Subnet 3=>10.128.0.0
And so on.

Sunday, May 22, 2011

IMP NOTES

Hiiiiiiii friends!!!!
Here are some imp notes which is involved in syllabus but not in textbook.
PEPTIDE MAPPING
http://www.nihs.go.jp/dbcb/Bio-Topic/peptide.pdf
PROCESS MODELLING AND STEPS
http://www.itl.nist.gov/div898/handbook/pmd/section4/pmd41.htm
NAVIER STOKES EQUATION
http://www.chemeurope.com/en/encyclopedia/Navier-Stokes_equations.html
REVERSE OSMOSIS
http://en.wikipedia.org/wiki/Reverse_osmosis
BEST OF LUCK FOR YOUR EXAM!!!!

Friday, February 25, 2011

REALITY OF LIFE

The meaning of life is not as complicated as some make it out to be. In fact, there is no meaning to life, plain and simple. Life came about naturally, and it will die out naturally. Humans were not "put here" to do anything; we evolved into what we are today. What I am referring to now is the grand meaning of life, to which there is none. However, every single individual has some kind of meaning. This meaning is not predetermined or destined, but chosen by the individual. It can be either good or bad, and it affects the rest of us in some way, minor or major. That's it.
Life is fragile, Life is short.
Live a balance lifestyle and enjoy Life!

Sunday, January 16, 2011

New year thought

New Year always brings some special significance to everyone. Everyone has some New Year thoughts in his or her mind, when a new year approaches and an old year departs. Some think to do all the things, which they did not do during the previous year.

Tuesday, January 11, 2011

About me

Hi!!!!!
This is Amit Subhash Pednekar from Navi Mumbai,Maharashtra state,India.
I am student of MGM's College of Engineering and Technology,Kamothe,Navi Mumbai.
I am in second year of Biotechnological Engineering.