Which of the following was a short term solution to the IPv4 address exhaustion problem?
NAT, specifically the PAT feature that allows many hosts to use private IPv4 addresses while being supported by a single public IPv4 address, was one short-term solution to the IPv4 address exhaustion problem. ARP has no impact on the number of IPv4 addresses used.
Which IPv6 multicast addresses are used by OSPFv3 for communications between OSPFv3 configured devices?
OSPFv3 uses multicast like OSPF (for IPv4) to communicate between local OSPF neighbors; the multicast addresses used for this are FF02::5 and FF02::6.
Which two IPv6 multicast addresses are used by OSPFv3 choose two?
OSPFv3 takes advantage of IPv6 multicasting, using FF02::5 for all OSPF routers and FF02::6 for the OSPF DR and BDR.
When a link local address is created on an IPv6 device it always has the prefix?
fe80::/
Link-local IPv6 addresses have a prefix of fe80::/10 and a 64-bit suffix which can be computed and managed by the host itself without requiring additional networking components.
Why is IPv4 still used?
this is essentially to combat the lack of available IPv4 addresses to assign a unique IPV4 address to your device . Backbone routers need to route IPv6 traffic ( actually need to be dual stack as IPV4 is going to hang around for years and years to come still) DNS system needs to accommodate IPV6 addressing.
What happens when we run out of IP addresses?
Experts predict that within three years we will see the last of new Web addresses. What will happen then? The best solution is to create a market for already assigned but unwanted numbers, says Harvard Business School professor Ben Edelman.
What is OSPFv3 in networking?
OSPFv3 is the Open Shortest Path First routing protocol for IPv6. It is similar to OSPFv2 in its concept of a link state database, intra- and inter-area, and AS external routes and virtual links. It is possible to enable OSPF and OSPFv3 at the same time. OSPF works with IPv4, and OSPFv3 works with IPv6.
What are two features of OSPFv3?
OSPFv3
- Support for multiple instances per link. —With OSPFv3, you can run multiple instances of the OSPF protocol over a single link.
- Protocol Processing Per-link.
- Changes to Addressing.
- Authentication Changes.
- Support for multiple instances per-link.
- New LSA Types.
What does OSPFv3 use link-local addresses for?
OSPFv3 routers use their link-local addresses as the source of hello packets. No IPv6 prefix information is contained in hello packets. Multiple IPv6 addresses can be configured on a link. None of the addresses are defined as secondary addresses, as is done with IPv4 to configure multiple addresses on a single link.
What is the purpose of link local IPv6 addresses?
IPv6 link-local addresses are addresses that can be used to communicate with nodes (hosts and routers) on an attached link. Packets with those addresses are not forwarded by routers.
What is a link local address in IPv6?
However, the only thing that comes close to IPv6 link-local addresses is the IPv4 Automatic Private IP Addressing (APIPA) method. When a host fails to obtain an IPv4 address with DHCP, it resigns itself to its fate of being incommunicado, and assigns its interface an APIPA address.
How many IPv6 are there?
IPv6 utilizes 128-bit Internet addresses. Therefore, it can support 2^128 Internet addresses—340,282,366,920,938,463,463,374,607,431,768,211,456 of them to be exact. The number of IPv6 addresses is 1028 times larger than the number of IPv4 addresses.
