ARP (Address Resolution Protocol)

It help ip network devices find other device on the same segment or Vlan |ـــــ ARP uses a local broad cast to discover neighboring device |ـــــ ARP resolves ip addresses to mac addresses so that machines on the same data link layer media can communicate with each other.


Protocol                                                                                   Protocol ID
Internet Control Message Protocol (ICMP)                                          1
Transmission Control Protocol (TCP)                                                  6
Interior Gateway Routing Protocol (IGRP)                                          9
User Datagram Protocol (UDP)                                                           17
Internet Protocol version 6 (IPv6)                                                       41
Internet-work Packet Exchange (IPX)                                                    111

Internet Control Message Protocol (ICMP)

• It is used to send error & control information between ip network devices.
• There are many diffident messages that can be shared, including the following: 

1. Echo request: Determines whether on ip node ( a host or a router is available on network.)
2. Echo Reply: Replies to ICMP echo request.
3. Destination Unreachable: Informs the host that a datagram can't be delivered.
4. Source Quench: Informs the host to lower the rate at which it sends datagram because of congestion.

5. Redirect: Informs the host of a preferred rate.

6. Time Exceeded: Indicate that the TTL of IP datagram has expired.

What is Datagram?

A datagram is a basic transfer unit associated with a packet-switched network in which the delivery arrival time and order are not guaranteed. A datagram consists of header and data areas, where the header contains information sufficient for routing from the originating equipment to the destination without relying on prior exchanges between the equipment and the network. The source and destination addresses as well as a type field are found in the header of a datagram.

Any thing About cisco Security Device Manager (SDM)

Part 3

Installing Cisco Security Device Manager (SDM)

Part 1

Part 2

Security Device Manager (SDM) - Cisco CCNA Security Training

Do you want to have FREEDOM ?

Publisher: Hall PTR
Language: English
ISBN: 0132435942
Paperback: 448 pages
Data: August 11, 2006
Format: PDF

Publisher: Apress
Language: English
ISBN: 1590596277
Paperback: 608 pages
Data: March 15, 2006
Format: PDF

Using the Pipe

 It is the output modifier. This pipe ( | ) allow us to wade through all the configurations or other long out puts & get straight to our goods fast.

Arman#sh run | ?
Append Append redirected out put to URL ( URLs supporting append operation only )
Begin Begin with the line that matches.