Working of Traceroute using Wireshark

Working of Traceroute using Wireshark

Hello Friends!! Today we are going to discuss working with traceroute using UDP/ICMP/TCP packets with help of Wireshark.

Traceroute or Tracert: It is a CUI based computer network diagnostic tools used in UNIX and Windows-like system respectively. It traces the path of a packet from the source machine to an Internet host such as Goole.com by calculating the average time taken each hop. Traceroute sends a UDP packet to the destination by taking benefit of ICMP’s messages. It uses the ICMP error-reporting messages –Destination Unreachable and Time exceeded.

TTL: The time-to-live value, also known as hop limit, is used in determining the intermediate routers being traversed between source to the destination. 

Hop: A hop is one portion of the path between source and destination. Data packets pass through bridges, routers and gateways as they travel between source and destination. On the internet, before the data reach its final destination, it goes through several routers and a hop occurs when an incoming packet is forwarded to the next router.

Asterisk (*): Denotes probe timeout which means that the router at that hop doesn’t respond to the packet received from the source used for the traceroute due to firewall filter.

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