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200-150 · Question #51

The network administrator has been asked to give reasons for moving from IPv4 to IPv6. What are two valid reasons for adopting IPv6 over IPv4? (Choose two.)

The correct answer is A. no broadcast E. autoconfiguration. IPv6 improves on IPv4 by eliminating broadcast traffic and supporting stateless address autoconfiguration (SLAAC), reducing administrative overhead and network congestion.

Cisco Data Center Networking Technologies

Question

The network administrator has been asked to give reasons for moving from IPv4 to IPv6. What are two valid reasons for adopting IPv6 over IPv4? (Choose two.)

Options

  • Ano broadcast
  • Bchange of source address in the IPv6 header
  • Cchange of destination address in the IPv6 header
  • DTelnet access does not require a password
  • Eautoconfiguration
  • FNAT

How the community answered

(58 responses)
  • A
    90% (52)
  • B
    5% (3)
  • C
    2% (1)
  • D
    3% (2)

Why each option

IPv6 improves on IPv4 by eliminating broadcast traffic and supporting stateless address autoconfiguration (SLAAC), reducing administrative overhead and network congestion.

Ano broadcastCorrect

IPv6 replaces broadcast with multicast and anycast, eliminating the bandwidth waste and processing overhead that IPv4 broadcasts impose on every host in a subnet - devices only process packets addressed to groups they have joined.

Bchange of source address in the IPv6 header

The ability to change a source address is not unique to IPv6 and is not a reason to migrate - both IPv4 and IPv6 support source address assignment.

Cchange of destination address in the IPv6 header

Changing the destination address is not a feature or advantage specific to IPv6 over IPv4.

DTelnet access does not require a password

Telnet password requirements are a function of device configuration and security policy, completely unrelated to the IP version in use.

EautoconfigurationCorrect

IPv6 supports Stateless Address Autoconfiguration (SLAAC), allowing hosts to automatically generate their own global unicast addresses using the network prefix from Router Advertisement messages combined with a locally derived interface identifier, without requiring a DHCP server.

FNAT

NAT is a workaround required by IPv4 address exhaustion - IPv6's vast address space makes NAT unnecessary, so NAT is a drawback of IPv4, not a reason to adopt IPv6.

Concept tested: IPv6 advantages over IPv4 - broadcast elimination and SLAAC

Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6_basic/configuration/xe-16/ip6b-xe-16-book/ip6-basic-slaac.html

Topics

#IPv6 migration#autoconfiguration#no broadcast#IPv4 vs IPv6

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