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Cisco 12
Mod 12
| Question | Answer |
|---|---|
| ICMPv6 Internet Control Message Protocol version 6 | address resolution and address autoconfig |
| what are the 3 migration techniques for migrating to IPv6? | Dual Stack, Tunneling, Translation |
| Dual Stack | allows IPv4 and IPv6 to coexist on the same network segment |
| Tunneling | a method of transporting an IPv6 packet over an IPv4 network |
| Translation | lets IPv6-enabled devices to communicate with IPv4-enabled devices using a translation technique similar to NAT for IPv4 |
| how many bits in length and what string are IPv6 addresses written as? | 128 bits, hexadecimal values |
| what is the preferred format for writing IPv6 addresses? | x:x:x:x:x:x:x:x |
| what is every four bits represented by? | single hexadecimal digit for a total of 32 hexadecimal values |
| what does each x consist of? | four hexadecimal values |
| what does hextet mean for IPv6 addresses? | a segment of 16 bits/four hexadecimal values |
| what is the first rule to reduce the notation of IPv6 addresses? | omit leading zeros |
| what is the second rule to reduce the notation of IPv6 addresses? | use a double colon (::) to replace a single contiguous string of one or more 16-bit hextets consisting of all zeros |
| compressed format | when rule one and two are used |
| three categories of IPv6 addresses | Unicast, Multicast, Anycast |
| Unicast | uniquely identifies an interface on an IPv6-enabled device |
| Multicast | sends a single IPv6 packet to multiple destinations |
| Anycast | is any IPv6 unicast address that can be assigned to multiple devices |
| what notation is IPv6 represented in? | slash notation |
| what is the prefix length range? | 0 to 128 |
| what two unicast addresses does IPv6 have? | GUA (Global Unicast Address), LLA (Link-Local Address) |
| GUA (Global Unicast Address) | a globally unique, internet-routable address |
| LLA (Link-Local Address) | communicates with other devices on the same local link |
| what does link mean for IPv6? | subnet |
| what is the range of unique local addresses? | fc00::/7 to fdff::/7 |
| what are unique local addresses used for? | local addressing within a site or limited number of sites |
| what are GUAs equivalent to? | public IPv4 addresses |
| what does GUAs first hexadecimal digit begin with? | 2 or 3 |
| Global Routing Prefix | the prefix/network portion of the address that's assigned by the provider to a customer or site |
| Subnet ID | the area between the Global Routing Prefix and the interface ID |
| Interface ID | is equivalent to the host portion of an IPv4 address |
| LLA | enables a device to communicate with other [[IPv6]]-enabled devices on the same link |
| what range is LLA in? | fe80::/10 range |
| what must every IPv6-enabled network have? | an LLA |
| what are two ways a device can get an LLA? | Statically, Dynamically |
| command ipv6 address ipv6-addressprefix-length | configs an IPv6 GUA on an interface |
| what are two ways a device can get a IPv6 GUA automatically? | SLAAC, Stateful DHCPv6 |
| why do you only need to make recognizable LLAs on routers? | router LLAs are used as default gateway addresses and routing advertisement messages |
| command ipv6 address ipv6-link-local-address link-local | manually configs LLAs |
| what messages do IPv6 routers periodically send out every 200 secs? | ICMPv6 RA messages |
| IPv6 unicast-routing | enables a router as an IPv6 router |
| what do ICMPv6 RA messages include? | Network Prefix and Prefix Length, Default Gateway Address, DNS Addresses and Domain Name |
| what are the three methods for RA messages? | 1.) SLAAC, 2.) SLAAC with a stateless DHCPv6 server, 3.) Stateful DHCPv6 (no SLAAC) |
| SLAAC | a method that allows a device to make its own GUA without the services of DCHPv6 |
| what do devices rely on when using SLAAC? | ICMPv6 RA messages of the local router to get necessary info |
| what does a stateless DHCPv6 server distribute | DNS server addresses and domain names (does NOT allocate GUAs) |
| what can a stateful DHCPv6 device automatically receive ? | its addressing info including, -GUA, -prefix length, -addresses of DNS servers from a stateful DHCPv6 server |
| what is DHCP for IPv4? | stateful |
| what does a stateful DHCPv6 server allocate and maintain? | a list of which device receives which IPv6 address |
| the default gateway address can only be obtained dynamically from what? | the RA message |
| what do stateless or stateful DHCPv6 servers not provide? | the default gateway address |
| if the RA message is either SLAAC or SLAAC with stateless DHCPv6 what must the client generate? | its own interface ID |
| what two parts are ethernet MAC addresses made up of? | OUI and Device Identifier |
| what must all IPv6 devices have? | an IPv6 LLA |
| what will cisco routers automatically make whenever a GUA is assigned to the interface? | a IPv4 LLA |
| command show ipv6 interface brief | displays the IPv6 address of the Ethernet interfaces |
| what do serial interfaces not have? | Ethernet MAC addresses |
| command Show IPv6 Route | verifies that IPv6 networks and specific IPv6 interface addresses have been installed in the IPv6 routing table |
| what prefix do IPv6 multicast addresses have? | ff00::/8 |
| what are well-known multicast addresses? | a single address used to reach a group of devices running a common protocol or service |
| what are ff02::1 all-nodes multicast groups? | a group that all IPv6-enabled devices join |
| what are ff02::2 All-routers multicast groups? | a multicast group that all IPv6 routers join |
| solicited-node multicast address | a address mapped to a special Ethernet multicast address |
| how many bits is : equal? | 16 bits |
Created by:
starrr
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