OSPF , RIP , IGRP, IS-IS and IP packet

ICMP , IGMP and etc, these protocols will be encapsulated within an ip packet ,,,I am right ?

Will these protocols (OSPF, ARP , RIP , IGRP, IS-IS) be encapsulated within an ip packet as well ? or they have there own packet structures

 

There are five network layer protocols: ARP, RARP, IP, ICMP, and IGMP.

ICMP itself is a network layer protocol. However, its messages are not passed directly to the data link layer as would be expected. Instead, the messages are first encapsulated inside ip datagrams before going to the lower layer.

I am aware that ICMP, IGMP, OSPF they will be encapsulated within an ip packet, what about the other ?

Are OSPF and RIP and IS-IS layer 3 protocols ?

 

yes they are layer 3 protocols

 

Thanks bro

 

I'm sorry, but unless you're talking about just the original Internet Protocol Suite, this is simply wrong:

http://en.wikipedia.org/wiki/Network_layer

for more information.

All of the NetWare LANs I installed, from 1987 and on, supported IPX and used it primarily. IPX is a layer 3 (network layer) protocol.

Later, I fondly remember using NLSP, in the NetWare v3.x, 4.x days... it was a nice link-state network protocol, smart, efficient, easy to implement, and especially useful in keeping IPX' RIP/SAP traffic to a minimum across WAN links.

Best of all, for me back then, it was a transparent, drop-in replacement for IPX and RIP/SAP. An amazing networking accomplishment, from my persepective, and that of those of my customers that benefitted from it.

Novell released it first for NetWare v4.x, but later retro-fitted it for NetWare v3.x... and it went a LONG way towards keeping slow WAN links viable.

http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/nlsp.htm

for more information on NLSP. NLSP is also a layer 3 (network layer) protocol.

I have also implemented X.25 links in the past, though I only did them point-to-point, under duress, when no other solution was available.

Note that X.25 is also a network layer protocol, by definition.

My very first personal Internet connection at home was via Advantis, IBM's Global Network (later bought by AT&T, and still available as AT&T Global Network Services): It was a SLIP connection, under OS/2, via analog modem.

SLIP is also a Layer 3 (network layer) protocol.

Regards,

dj