Practice Test Geeks(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test
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IPv4 and IPv6 Flashcards

7 cards from real ICND1 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 IPv4 and IPv6 flashcards as text

  1. Which IPv6 address type is functionally equivalent to an IPv4 private address and is routable only within an organization (not on the internet)?

    Answer: Unique local (FC00::/7)

    Unique local addresses (FC00::/7, typically FD00::/8) are the IPv6 equivalent of RFC 1918 private addresses — routable within a site but not on the global internet.

  2. What is the broadcast address of the subnet 10.0.0.0/8?

    Answer: 10.255.255.255

    For 10.0.0.0/8, all 24 host bits set to 1 gives a broadcast address of 10.255.255.255.

  3. A Cisco router shows 'show ipv6 interface brief' and displays 'FE80::1' under GigabitEthernet0/0. What kind of address is this?

    Answer: Link-local address auto-configured on the interface

    FE80::/10 addresses are link-local and are automatically configured on every IPv6-enabled interface without needing global routing.

  4. Which protocol does IPv6 use instead of IGMP for multicast group management?

    Answer: MLD (Multicast Listener Discovery)

    Multicast Listener Discovery (MLD) is the IPv6 equivalent of IGMP and is used by hosts to join or leave multicast groups.

  5. How many IPv4 addresses does a /23 subnet contain in total?

    Answer: 512

    A /23 has 9 host bits, so 2^9 = 512 total addresses (510 usable hosts).

  6. Which Cisco IOS command enables IPv6 routing on a router?

    Answer: ipv6 unicast-routing

    The global configuration command 'ipv6 unicast-routing' enables the router to forward IPv6 packets between interfaces.

  7. What is the network address and prefix length for an IP address of 172.20.15.130 with a subnet mask of 255.255.255.128?

    Answer: 172.20.15.128/25

    255.255.255.128 is /25 (block of 128); 130 falls in the second block starting at .128, so the network address is 172.20.15.128/25.