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Chapter4Summary.pdf Flashcards
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Chapter4Summary.pdf Flashcards
Chapter4Summary.pdf Flashcards
Study
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Chapter4Summary.pdf Flashcards
Study
View
Chapter4Summary.pdf Flashcards
Study
1
Question
What is the standard representation for writing down IPv6 addresses?
Answer
The standard representation for writing down IPv6 addresses is xxxxxxxx where each x is a hexadecimal representation of a 16-bit piece of the address.
2
Question
How can an IPv6 address with a large number of contiguous 0s be written more compactly?
Answer
An IPv6 address with a large number of contiguous 0s can be written more compactly by omitting all the 0 fields.
3
Question
What is the special notation for IPv6 addresses that contain an embedded IPv4 address?
Answer
IPv6 addresses that contain an embedded IPv4 address have a special notation where the last 32 bits are written in IPv4 notation rather than as a pair of hexadecimal numbers separated by a colon, with a double colon at the front indicating the leading 0s.
4
Question
What is the purpose of the address allocation plan for IPv6 unicast addresses?
Answer
The purpose of the address allocation plan for IPv6 unicast addresses is to provide aggregation of routing information, similar to CIDR in IPv4, to reduce the burden on intradomain routers by using an address prefix to aggregate reachability information to a large number of networks and autonomous systems.
5
Question
How does the IPv6 header format compare to the IPv4 header format?
Answer
The IPv6 header format is 40 bytes long, compared to the 20 bytes long in the absence of options for IPv4. IPv6 has a simpler header format due to the removal of unnecessary functionality, with the Version set to 6, TrafficClass and FlowLabel fields related to quality of service, PayloadLen field indicating packet length excluding the header, NextHeader field replacing IP options and Protocol field of IPv4, and HopLimit field reflecting TTL usage. Source and destination addresses in IPv6 are 16 bytes (128 bits) each.
6
Question
What is stateless autoconfiguration in IPv6 and how does it differ from DHCP?
Answer
Stateless autoconfiguration in IPv6 is a form of autoconfiguration that does not require a server, unlike DHCP in IPv4. The longer address format in IPv6 enables stateless autoconfiguration, where hosts can obtain a unique interface ID on the link and the correct address prefix for the subnet without the need for a server to hand out addresses and configuration information.
7
Question
What is the purpose of the routing header in IPv6?
Answer
The routing header in IPv6 allows specifying a list of IPv6 addresses representing nodes or topological areas that packets should visit en route to their destination. It provides advanced routing capabilities by enabling hosts to define routes based on criteria like cost or security, and introduces anycast addresses to specify topological entities rather than individual nodes.
