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- Please help

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#1 red_sky


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Posted 29 October 2012 - 03:52 AM

Why do some protocols in the transport layer Udp protocol to use ?

how many are Daily switches ?
For example, the switches Layer 2 , Layer 3, Layer 4, Layer 7

How Traceroute Works?

Packet header at the transport layer in what will change ?

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#2 Sneakycyber


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Posted 29 October 2012 - 05:09 AM

I hope this is the answer your looking for.. First question UDP is "send and forget" its much faster than TCP. Good for DNS, DHCP, TFTP, SNMP, RIP, VOIP etc.... TCP is a "Request/Acknowlege" connection it establishes a connection to the Computer and negotiates request, acknowelge, transmit, aknowlege, error checking, etc.. TCP is best for HTTP, HTTPs, FTP, SMTP Telnet etc...See Here and Here

The second question I am afraid I dont understand.

Traceroute works by sending a ICMP packet to the destination host. Everytime the ICMP packet hits a router a return ICMP packet is sent giving the sender the information of the router. Each traceroute sends out a sequence of packets increasing the TTL value each time. This will tell you how many routers and networks your packet transverses before it gets to its destination.

The Data packet header contains the source and destination IP, protocol information, and Packet frame size. See here
Chad Mockensturm 
Network Engineer
Certified CompTia Network +, A +

#3 red_sky

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Posted 01 November 2012 - 04:45 PM

Thank you very much
But about my second question,my purpose was : How many are delay switches?
All questions about I need more description, if you have articles about , please introduce me

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