The concept of synchronized aynchronous trnasfer mode is each packet is continuously synchronized with the leading edge of a ascii code. This creates zero wait state. Other signals can not jam into the bit stream. Therefore, you created a tight coupling between server and client. Even if you pass thru many remote monitoring servers. they can cache but you can delete.

Unfortunately, you also have to be aware that you can not hog the internet route very long; so you can only agree on a time limited window of synchronization via atomic clock synchronization and assigned time period. The advantage is you can go offline to prevent people to download all the contents of your email(Computer Associates' fraud prevention software via remote monitoring server done in India out sourcing outfits) or entire content of your hdd in the extreme case, after the timed window is closed.

So, if you pass thru remote monitoring servers you will detect the IP address and delete all the cache data on your packets upon completion of your data transmission. Or else you have to use encription keys that the remote monitors are not able to decipher your packet.

Firewalls today are not yet sophisticated enough in user trusted credentials. Once the lock down happens on user acceptance then encripted data(banking requirement) happens. Remote monitors are locked out. But the first criteria is not allowing hackers to use your credentials. Credentials are password, Ip address, caller id, hdd checksum, email accounts, etc. which has to have artificial intelligence and fuzzy logic to use packet format creation(for dedicated virtual hard wiring to two connections exclusively, usually a packet within a packet same as the german enigma machine disks) and thus packet switching to stop hackers from being able to read or write.

So, you think firewall is a waste of time? It is only because programming of firewall functions are not yet completely foolproof.

Footnote:
Computer Associates created an opportunity for their employees to steal other people's money from credit and debit card accounts via remote monitors in India. This firewall protection is designed to stop remote monitors from looking into your hdd and its entire content, especially your assets.

The trust factor is the most important firewall password.

It is the serial number of the computer in the cpu id. But Intel abandoned that identity assurance. But, we still have a combination of numbers that is unique in any compaters. It is the combination of 4 number PNP indentification numbers. Any device has 4 numbers. It is only a question of how many plug and play devices you have in your computer and you have a unique identity with sequential of decimal numbers commonly associated with cpu, video card(s), PCI cards, etc.

This identity number will lock down the data transfer packet in the .net packet format as an additional password.

Banks currently take your password(pin) then give your computer a password from the bank, in addition to cookies.

So, firewalls probably will force Intel to resume a fused(not flash) cpu id number(SMB read of last L2 cache memory fused) to identify your computer for unique locked down data transfer. It is as good as caller id, or fixed password unique to your personal keyword.