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diff --git a/comp/work/62/starter b/comp/work/62/starter new file mode 100644 index 0000000..67dc3c5 --- /dev/null +++ b/comp/work/62/starter @@ -0,0 +1,19 @@ +The transport layer will format the packet with the send address and return address, this is the IP part of the protocol. It will package the data up in such a way that it can be sent down many different routes. The transport layer is the section that desides the route, sending many packets down different routes is called packet switching. + +To act as a connection point for all the devices. + +IMAP -- recives mail from the internet and stores it in a "mail box", this can be retrieved by many devices, allowing mail to be synced between them. + +SMTP -- sends mail, will send it to another users mail box. + +A well known port is a port that all applications implementing a spceific protocol will use. + +This is to ensure that these applications are cross compatibe with eachother, and that communication can be automatic (no need to have a different port for every person you want to talk too). + +Computer A has a private key +The email will be sent with a public key +The private key is used to encrypt the data +The public key can decrypt the data +Computer B will recive the email and attempt to decrypt it with the public key +If it can do this, then it means the email must have been sent from computer A +If not, then it couldn't have been sent from computer A |