. . . 4th Lecture - Networking . . .

[ToughGuy]

you rock you rock you rock you rock you rock

[k2s]

any dbts ????
will continue after 1 hr

[k2s]

sSa_j@il

[k2s]

Next Topic:

IPv4 Packet Format & its contents


[img]http://uw713doc.sco.com/en/NET_tcpip/graphics/IPv4header.gif[/img]

An IPv4 header contains the following fields:


version
The IP version number, 4.

length
The length of the datagram header in 32-bit words.

type of service
Contains five subfields that specify the precedence, delay, throughput, reliability, and cost desired for a packet. (The Internet does not guarantee this request.) This field is not widely used on the Internet.

total length
The length of the datagram in bytes including the header, options, and the appended transport protocol segment or packet.

identification
An integer that identifies the datagram.

flags
Controls datagram fragmentation together with the identification field. The flags indicate whether the datagram may be fragmented, whether the datagram is fragmented, and whether the current fragment is the final one.

fragment offset
The relative position of this fragment measured from the beginning of the original datagram in units of 8 bytes.

time to live
How many routers a datagram can pass through. Each router decrements this value by 1 until it reaches 0 when the datagram is discarded. This keeps misrouted datagrams from remaining on the Internet forever.

protocol
The high-level protocol type.

header checksum
A number that is computed to ensure the integrity of the header values.

source address
The 32-bit IPv4 address of the sending host.

destination address
The 32-bit IPv4 address of the receiving host.

options
A list of optional specifications for security restrictions, route recording, and source routing. Not every datagram specifies an options field.

padding
Null bytes which are added to make the header length an integral multiple of 32 bytes as required by the header length field.
IPv4 address notation

A TCP/IP network routes a packet according to the destination IP address, an address provided by the IP protocol on the sending host. IPv4 addresses are 32-bit numbers that uniquely identify every host computer connected to the Internet. This 32-bit address is typically represented as four decimal numbers separated by dots, for example:

  202.16.208.51
The network address (the part of the address that identifies your network) and the host address (the part that identifies an individual host on your network) must all fit into this 32-bit number. The number of hosts you can configure for your network decreases as the length of the portion occupied by the network address increases.

[k2s]

this is how an IP capture looks like

[img]http://www.networkur.com/wp-content/uploads/2011/04/IP-Packet1.jpg[/img]

[BUGZ]

sSa_j@il

[Chocolateboy]

[quote author=BUGZ link=topic=236491.msg2946794#msg2946794 date=1315888414]
sSa_j@il
[/quote]

sHa_clap4 CITI_$D#

replies levu ani digulu vaddu ba.. evaranna okkaru chusi emanna nerchukunna konchem.. nuvvu ne target reach ayinatle. cinema dialogue ee but fact.

[k2s]

[quote author=Chocolateboy link=topic=236491.msg2946801#msg2946801 date=1315888545]
sHa_clap4 CITI_$D#

replies levu ani digulu vaddu ba.. evaranna okkaru chusi emanna nerchukunna konchem.. nuvvu ne target reach ayinatle. cinema dialogue ee but fact.
[/quote] sSa_j@il

[Chocolateboy]

[quote author=k2s link=topic=236491.msg2946804#msg2946804 date=1315888592]
sSa_j@il
[/quote] H&*() H&*() S#d^ H&*() H&*()

[k2s]

[quote author=Chocolateboy link=topic=236491.msg2946806#msg2946806 date=1315888620]
H&*() H&*() S#d^ H&*() H&*()
[/quote]

chadivava asalu nenu emi cheppano ??

[Chocolateboy]

[quote author=k2s link=topic=236491.msg2946809#msg2946809 date=1315888734]
chadivava asalu nenu emi cheppano ??
[/quote]

naku asalu teliyadu ba idi antha. nenu comp sciences kadu ga.. Mech  sSa_j@il sSa_j@il sSa_j@il

[k2s]

[quote author=Chocolateboy link=topic=236491.msg2946811#msg2946811 date=1315888821]
naku asalu teliyadu ba idi antha. nenu comp sciences kadu ga.. Mech  sSa_j@il sSa_j@il sSa_j@il
[/quote]


Mech aa  H&T@ H&T@ H&T@

maa kwalegy lo Mech forilu  H&T@

[Chocolateboy]

[quote author=k2s link=topic=236491.msg2946813#msg2946813 date=1315888943]

Mech aa  H&T@ H&T@ H&T@

maa kwalegy lo Mech forilu  H&T@
[/quote] btech lo electr..

ms lo mech  &D_@@ &D_@@

H&T@

[k2s]

[quote author=Chocolateboy link=topic=236491.msg2946814#msg2946814 date=1315888990]
btech lo electr..

ms lo mech  &D_@@ &D_@@

H&T@
[/quote][img]http://i56.tinypic.com/de4dwi.gif[/img]

[Chocolateboy]

[quote author=k2s link=topic=236491.msg2946816#msg2946816 date=1315889079]
[img]http://i56.tinypic.com/de4dwi.gif[/img]
[/quote] endukantha expression... btech lo konni subs unnay le mech vi  F@!n F@!n