logging in or signing up ICMP raghut44 Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 949 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: February 02, 2011 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Internet Control Message Protocol: Internet Control Message Protocol ICMPICMP: ICMP ICMP has two major purposes: To report erroneous conditions To diagnose network problemsICMP Message Format: ICMP Message Format Type Code Checksum Data 1 byte 1 byte 2 bytes ? Which type of message? Which sub-type of message? Checksum of entire ICMP message Extra data (specific to the type of message)Important ICMP Messages: Important ICMP Messages Echo Request/Reply Destination Unreachable Redirect Time Exceeded Parameter Problem Router Advertisement/DiscoveryEcho Request/Reply: Echo Request/Reply Echo Request (Type: 8, Code: 0): Requests that the receiving host send a copy (echo) of the request back to the sender Echo Response (Type: 0, Code: 0): The response from the receiving host Using these 2 commands is one way that the ping command can perform its functionDestination Unreachable: Destination Unreachable Network Unreachable (Type: 3, Code: 0): The network of the packet’s destination address field could not be reached Network Unknown (Type: 3, Code: 6): The network of the packet’s destination address field could not be located Host Unreachable (Type: 3, Code: 1): The host specified by the destination address could not be reached Host Unknown (Type: 3, Code: 7): The host specified by the destination address could not be located Protocol Unreachable (Type: 3, Code: 2): The specified protocol (e.g. TCP or UDP) could not be established with the specified host Port Unreachable (Type: 3, Code: 3): The specified port number could not be reachedRedirect: Redirect Redirect (Type: 5, Code: 0): This router knows of a better path to the specified destination The next router in the new path is providedTime Exceeded: Time Exceeded Time Exceeded (Type: 11, Code: 0): The router has decremented the hop limit of a packet to zero and dropped the packetParameter Problem: Parameter Problem Parameter Problem (Type: 12, Code: 0): Part of all of the packet’s IP header was invalidRouter Advertisement/Discovery: Router Advertisement/Discovery Router Advertisement (Type: 9, Code: 0): A router announces its existence using this type of message Router Discovery (Type: 10, Code: 0): A host explicitly searches for a routerPing: Ping ICMP Echo Request (Type: 8, Code: 0) ICMP Echo Response (Type: 0, Code: 0) Destination SourceTraceroute: Traceroute Destination Router 1 Router 2 Router 3 Packet w/ Hop Limit = 1 ICMP Time Limit Exceeded Packet w/ Hop Limit = 2 ICMP Time Limit Exceeded ICMP Time Limit Exceeded Packet w/ Hop Limit = 3 Response to Packet Packet w/ Hop Limit = 4 Source You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.