Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
91 Cards in this Set
- Front
- Back
|
What is the first header field in IPv4 and v6? |
Version |
|
|
What does the IPv6 Traffic Class field do? |
Provide QoS information |
|
|
What does the Flow Label IPv6 header do? |
Provides information for non-default QoS connections |
|
|
What field replaces the IPv4 TTL field? |
Hop Limit |
|
|
What is a global unicast address? |
A globally unique, routable address |
|
|
What is a unique local address? |
An internally-routable address guaranteed to be unique on a given network |
|
|
What is a site-local address? |
A non-routable address guaranteed to be unique on a given subnet. No longer used. |
|
|
What prefix do link-local addresses start with? |
FE80::/10 |
|
|
What is a block of IPv6 addresses called? |
A global routing prefix |
|
|
What does RIR stand for? |
Regional Internet Registry |
|
|
What was the original space allocated for global unicast addresses (in hex and binary)? |
2000::/3 (001) |
|
|
What addresses are currently reserved for global unicast addresses? |
Anything not otherwise reserved |
|
|
What address space is reserved for unique local addresses (hex/binary)? |
FC and FD (1111 110x) |
|
|
What address space is reserved for multicast addresses (hex/binary)? |
FF (1111 1111) |
|
|
What is the most common subnet? |
/64 |
|
|
What prefix length ranges are usually assigned to companies? |
/32 - /48 |
|
|
What is the subnet ID called in v6? |
Prefix ID |
|
|
What does SLAAC stand for? |
Stateless Address Autoconfiguration |
|
|
What are the steps to manually create a unique local addressing scheme? |
Pick a random 48-bit global ID starting with FD and use a 16-bit subnet ID |
|
|
How will a router behave if it is given an IPv6 address but ipv6 unicast-routing isn't run? |
It will act as an IPv6 host, but won't route IPv6 traffic |
|
|
What type of interface doesn't have a MAC address? |
A serial interface |
|
|
What MAC address will a serial interface use if EUI-64 is configured on it? |
The MAC address of the lowest-numbered interface on the device |
|
|
What type of address does IPv6 use when determining next-door and default-gateway addresses? |
Link-local |
|
|
When would you use "ipv6 enable" on an interface without assigning an IPv6 address? |
When a segment will have no IPv6 hosts needing a global unicast address (e.g., a router-to-router link) |
|
|
What does the multicast address FF02::1 point to? |
All nodes on a link |
|
|
What multicast address refers to all nodes on a link? |
FF02::1 |
|
|
What does the multicast address FF02::2 refer to? |
All routers |
|
|
What multicast address refers to all routers? |
FF02::2 |
|
|
What does the multicast address FF02::5 refer to? |
All OSPF routers |
|
|
What multicast address refers to all OSPF routers? |
FF02::5 |
|
|
What does the multicast address FF02::6 refer to? |
All OSPF DR routers |
|
|
What multicast address refers to all OSPF designated routers? |
FF02::6 |
|
|
What does the multicast address FF02::9 refer to? |
All RIPng routers |
|
|
What multicast address refers to all RIPng routers? |
FF02::9 |
|
|
What does the multicast address FF02::A refer to? |
All EIGRPv6 routers |
|
|
What multicast address refers to all EIGRPv6 routers? |
FF02::A |
|
|
What does the multicast address FF02::1:2 refer to? |
All DHCP relay agents |
|
|
What multicast address refers to all DHCP relay agents? |
FF02::1:2 |
|
|
What pool are anycast addresses drawn from? |
The unicast address pool |
|
|
What command will set an anycast addresses on an interface? |
Ip address <address/prefix> anycast |
|
|
What prefix length is often used with an anycast address? Why? |
/128, so the address gets advertised like a network |
|
|
How long is an IPv6 address (in bits and hex)? |
128 bits (32 hex) |
|
|
What does IPv6 use instead of broadcasts? |
Multicasts |
|
|
What prefix denotes unique local addresses? |
FC00::/7 |
|
|
What prefix denotes multicast addresses? |
FF00::/8 |
|
|
What address does a host use before receiving an IP in DHCP stateful configuration? |
:: |
|
|
What is the IPv6 loopback address? |
::1 |
|
|
How is an IPv4 address denoted in IPv6? |
It is prepended with 0.0.0.0. |
|
|
What multicast address is used for 6-to-4 tunneling? |
2002::/16 |
|
|
What is the multicast address 2002::/16 used for? |
6-to-4 tunneling |
|
|
What is stateless autoconfiguration? |
A device's ability to assign its own IP address |
|
|
What command enables IPv6 routing? |
Ipv6 unicast-routing |
|
|
How is IPv6 enabled on an interface? |
Assign it an IPv6 address |
|
|
What command will tell an interface to build just a link-local address? |
Ipv6 enable |
|
|
What are the 2 rules for building an interface identifier from a MAC address? |
Insert FFFE into the middle of the MAC, and flip the 7th bit |
|
|
What command assigns a unicast address to an interface based on its MAC? |
Ipv6 address <prefix>/<prefix_length> eui-64 |
|
|
What 2 parts make up the 1st half of a v6 address? |
Global prefix and subnet ID |
|
|
What network communication occurs when a host attempts to perform SLAAC? |
The device sends a Router Solicitation (RS) to FF02::2, and a router responds with a Router Advertisement (RA) to FF02::1 |
|
|
What command will tell an interface to autoconfigure a v6 unicast address? |
Ipv6 address autoconfig |
|
|
What command will tell an interface to configure its own IPv6 address and get a default gateway from a router? |
Ipv6 address autoconfig default |
|
|
What message does a DHCPv6 client send out when booting? What address does it send it to? |
It sends a DHCP Solicit message to FF02::1:2 |
|
|
What does IPv6 use instead of v4's Fragmentation field? |
Extension headers |
|
|
Is ICMPv6 a separate protocol? |
No, it has been rolled into IPv6 |
|
|
What does ICMP do in v6 to prevent IP fragmentation? |
Path MTU Discovery |
|
|
What is Path MTU Discovery? |
ICMPv6's method of preventing IP fragmentation |
|
|
How does Path MTU Discovery work? |
ICMP sends a packet equal to MTU size to a destination; if it receives a "packet too big" message it reduces the packet to the required size and iterates until it reaches the destination |
|
|
What is an ICMP Type 1 message? |
Destination Unreachable |
|
|
What is an ICMP Type 128 message? |
Echo Request |
|
|
What is an ICMP Type 129 message? |
Echo Reply |
|
|
What is an ICMP Type 133 message? |
Router Solicitation |
|
|
What is an ICMP Type 134 message? |
Router Advertisement |
|
|
What is an ICMP Type 135 message? |
Neighbor Solicitation |
|
|
What is an ICMP Type 136 message? |
Neighbor Advertisement |
|
|
Does IPv6 use a checksum? |
No -usually handled by Data Link layer anyway |
|
|
What is the ICMP Message Type for Destination Unreachable? |
1 |
|
|
What is the ICMP Message Type for an echo request? |
128 |
|
|
What is the ICMP Message Type for an echo response? |
129 |
|
|
What is the ICMP Message Type for a router solicitation? |
133 |
|
|
What is the ICMP Message Type for a router advertisement? |
134 |
|
|
What is the ICMP Message Type for a neighbor solicitation? |
135 |
|
|
What is the ICMP Message Type for a neighbor advertisement? |
136 |
|
|
What does ICMP use to tell the local router that a device is joining a multicast group? |
Multicast listener discovery |
|
|
What does a host do if it believes its default gateway has gone down? |
It sends out a Router Solicitation message to look for a new one |
|
|
What does a host use to prevent a duplicate address? |
Duplicate Address Detection |
|
|
How does Duplicate Address Detection (DAD) work? |
When a host receives an address, it sends out a Neighbor Solicitation to that address to see if anyone responds |
|
|
What 2 routes are created when a unicast address is present on a working link? |
A connected route (for the subnet) and a local route (for the unicast address) |
|
|
When specifying a next-hop using the destination's link-local address, what additional piece of information is required? |
The outgoing interface |
|
|
What RFC defines IPv6? |
RFC 2460 |
|
|
What type of address forms the basis for Neighbor Discovery? |
Solicited-node multicast addresses |
|
|
How is a solicited-node multicast address calculated? |
FF02:::1:FF00/104 + the 24 lowest-order bits of an address |
|
|
Which addresses on a device are used to create corresponding solicited-node multicast addresses? |
All addresses on a device will have corresponding solicited-node multicast addresses |
