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Explanation:
Answer:
The data-link layer
Explanation:
The physical layer and data-link layer are often confused a lot especially in terms of what they do in the TCP/IP 7 layer protocol. The physical layer as the name suggests represents the physical devices like the cables and the connectors that join or interconnect computers together. This layer is also responsible for sending the signals over to other connections of a network. The data-link, on the other hand, translates and interprets these sent binary signals so that network devices can communicate. This layer is responsible in adding mac addresses to data packets and encapsulating these packets into frames before being placed on the media for transmission. Since it resides in between the network layer and the physical layer, it connects the upper layers of the TCP/IP model to the physical layer.
Answer:
Boot Sector Virus
Explanation:
A malicious software or malware is an executable line of code, programmed by a cybercriminal for ill intentions. There are many types of malware namely; viruses, rootkit, keylogger, trojan horse etc.
A boot sector virus is a kind of malware that runs before the operating system, affecting the boot sector of the hard disk, so even when a linux live cd is running as the operating system, the virus is still active.
Restore is a procedure to copy one or more files from backup media to the original disk or a replacement disk when data or programs have been erased or destroyed.
