Answer: (C) MAC
Explanation:
MAC is stand for the message authentication code and it is one of the key dependent hash function. Message authentication provide the data integrity and also the origin of data authentication.
- It basically allow the specific recipients known as the holder of the symmetric key.
- The message authentication code uses the CBC (Cipher block chaining) mode for constructing the MAC algorithm and it also uses the block cipher for the conjunction by using the CBC operations.
On the other hand, all the options are incorrect as they are not the key dependent hash function.
Therefore, Option (C) is correct.
Answer:
The department of homeland security mission is to provide the efficient and good security system to the nation in all the aspects against the terrorism.
The main aim of the department of homeland security mission is to anticipate fear based oppressor assaults inside the United States, decrease the weakness of the United States to psychological oppression, and limit the harm, and aid the recuperation from psychological oppressor assaults that do happen in the United States.
The main responsibility of this department is that:
- Providing the security against the threats of terrorism attacks
- Providing the effective and quick recovery from the disaster
- Also, give the secured cyber space to the homeland.
Answer:
Network switch has been disconnected or switched off
Explanation:
An organization networking can be done by using several switches, routers, modems, etc. A network switch works between modem and systems, connecting the systems to the network.
A network switch is a multi-port switch that connects multiple devices to the network. mostly every floor has a network switch connected with the floor systems.
When a system is connected to switch, its indicator light on NIC is active. but as per the scenario, no system has active indicator lights on NIC, which means that there is some problem with the switch or switch is powered off.
