D. staying connected with an old friend.
Answer: False
Explanation:
The given statement is false, as the configuration of the firewall, operational and administration procedure must be documented.
The configuration of multiple firewall are identical and the integrity and also performance of the configuration firewall files are check on the regularly bases.
It is basically used to avoid the security leaks and the documentation errors so it is necessary that it should be check regularly so that it can easily implement without any interrupt occurrence.
Answer: Please see below as the answer is self-explanatory
Explanation:
In a telephone system, we call signaling to all signals that are originated within a telephony circuit, that are not part of the conversation between the calling parties.
We include in this broad category, the signal generated by the calling party when he picks up the phone, the call tone sent to him by the switch (or the busy tone if the call can't be established due to blocking), the digits that identify the called party, the ringing signal that informs the called party that someone is trying to reach him for a call, among others like are defined in the SS7 or the different 2G/3G/4G Cellular standards.
The importance of the signalling is pretty obvious; without these signals, it will be virtually impossible to set up a connection between the two parties.