What is the cause of thrashing? How does the system detect thrashing? Once it detects thrashing, what can the system do to eliminate this problem?

Correct Answer: 48

Explanation:

MAC - Media Access Control, address is a globally unique identifier assigned to network devices, and therefore it is often referred to as hardware or physical address.

 

MAC addresses are 6-byte (48-bits) in length, and are written in MM:MM:MM:SS:SS:SS format.

Correct Answer: 32 bits

Explanation:

Internet Protocol version 4 (IPv4) which defined an IP address as a 32-bit value

IPv4 is in contrast to IPv6, which defined an IP address as a 128 bits value.

Correct Answer: TCP

Explanation:

Telnet uses TCP at layer 4. It uses IP at layer 3. We know that Telnet uses TCP/IP protocol, but in the question, it is asked specifically at layer 4 what is used in Telnet. So it is TCP at layer4 and IP at layer 3.

Correct Answer: Physical layer

Explanation:

Hubs are specified or operate at Layer1 i.e, the physical layer in the OSI model. Hubs regenerate electrical signals. A hub sends data packets (frames) to all devices on a network, regardless of any MAC addresses contained in the data packet.

Correct Answer: The degeneration of a signal over distance on a network cable is called attenuation

Correct Answer: Also called FIFO anomaly Usually, on increasing the number of frames allocated to a process virtual memory, the process execution is faster, because fewer page faults occur Sometimes, the reverse happens, ie, the execution time increases even when more frames are allocated to the process This is Belady's Anomaly This is true for certain page reference patterns

Correct Answer: - Normal completion - Time limit exceeded - Memory unavailable - Bounds violation - Protection error - Arithmetic error - Time overrun - I/O failure - Invalid instruction - Privileged instruction - Data misuse - Operator or OS intervention - Parent termination

Correct Answer: Page swapping or page replacements are called page cannibalizing

Correct Answer: Time taken for switching from one process to other is pure over head Because the system does no useful work while switching So one of the solutions is to go for threading when ever possible

Correct Answer: C2 level security provides for: 1Discretionary Access Control 2Identification and Authentication 3Auditing 4Resource reuse