0 — Test 347

Correct Answer: C. C. High bandwidth
Explanation: In IPv6, real-time audio or video, particularly in digital form, requires resources such as high bandwidth, large buffers, long processing times, and so on. A process can make a reservation for these resources beforehand to guarantee that real time data will not be delayed.

Correct Answer: A. A. Tunneling
Explanation: IPv6 tunneling enables IPv6 hosts and routers to connect with other IPv6 hosts and routers over the existing IPv4 Internet. The main purpose of IPv6 tunneling is to deploy IPv6 as well as maintain compatibility with large existing base of IPv4 hosts and routers.

Correct Answer: B. B. Broadcasts have been eliminated and replaced with multicasts
Explanation: In IPv6, there’s no longer any broadcast, sending one packet to a large number of unspecified hosts. There’s only multicast, unicast and anycast. In IPv6 all nodes are required to support multicast.

Correct Answer: C. C. Tos field
Explanation: This field enables to have different types of IP datagram. In an IPv6 packet, the Traffic Class byte is used in the same way as the ToS byte in an IPv4 packet. A ToS/Traffic Class byte includes a DSCP (Differentiated Services Codepoint) and precedence bits.

Correct Answer: D. D. All of the mentioned
Explanation: All the features are only present in IPv4 and not IPv6. IPv6 no longer has a header checksum to protect the IP header, meaning that when a packet header is corrupted by transmission errors, the packet is very likely to be delivered incorrectly.

Correct Answer: A. A. Protocol
Explanation: IPv6 is designed to allow the extension of the protocol if required by new technologies or applications. IPv6 uses a new header format in which options are separated from the base header and inserted, when needed, between the base header and upper-layer data.

Correct Answer: B. B. Six extension headers
Explanation: The length of the base header is 40 bytes. However, to give more functionality to the IP datagram, the base header can be followed by up to six extension headers.

Correct Answer: D. D. 200
Explanation: In an IPv6 datagram, M bit is 0, value of HLEN is 5, the value of total length is 200 and offset value is 200. If the M bit is 0, it means there are no more fragments, the fragment is the last name.

Correct Answer: A. A. System calls
Explanation: To access services of the Operating System an interface is provided by the System Calls. Generally, these are functions written in C and C++. Open, Close, Read, Write are some of most prominently used system calls.

Correct Answer: D. D. All of the mentioned
Explanation: All the mentioned errors are handled by OS. The OS is continuously monitoring all of its resources. Also, the OS is constantly detecting and correcting errors.