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;
36 Cards in this Set
- Front
- Back
|
What is EUI-64 (Extended Unique Identifier) |
method use to automatically configure IPv6 host addresses |
|
|
What does the 64 in EUI means? |
64-bit interface ID generated by ipv6 device |
|
|
What is the reserved 16 bit value inserted between a mac address to create the EUI number ? |
0xFFFE |
|
|
What is the Link local prefix? |
FE80::/10 |
|
|
What is link local used for? |
auto configuration and neighbors discovery |
|
|
What is one ipv6 address routers do not forward? |
Link local |
|
|
What is an ipv6 address that is routable? |
Ipv6 global address |
|
|
How long is the global ipv6 address? |
128 (64 interface ID, 64 subnet ID) |
|
|
What is the global Unicast addresses range? |
2000::/3 - to 3FFFF::/3 |
|
|
What protocol is used to create a mapping between ipv4 and Ipv6? |
NAT 64 |
|
|
What does NAT-PT does as a protocol ? |
Facilitate IPV4 packets to tunnelled over Ipv6 infrastructure. |
|
|
What is the address of unique local address |
fd00::/8 |
|
|
Helow is IPV6 Unique Addresses constructed |
a random 40 generated bits and add add it to FD00::/8 |
|
|
What make IPV6 more secure |
IPSec security is mandatory for IPv6 |
|
|
What is anycast adress used for |
Load balancing |
|
|
In which field we find the ECN ( explicit congestion notification? |
Traffic class Field |
|
|
What new field order packets in ipv6 header. |
Flow label( it labels data sequence so router can recognize what data belong to what packet . No more re-ordering data) |
|
|
Which ipv6 header field is used to prevent data packets from looping into the network indefinitely. |
Hop limit |
|
|
How does IPV6 remove dependability on DHCP server? |
Enable devices to self-acquire an IPv6 address and communicate within that subnet. |
|
|
What is one new change IPV6 brings to mobile devices? |
They can roam around with the need to change IP address |
|
|
What are some mechanism use to transition ipv4 to IPV6? |
* Dual stack implementation * Tunnelling * NAT-PT |
|
|
What does the router check for Destination for IPV6 packet ? |
Neighbor cache |
|
|
What happened when there is no mac address Match in IPV6? |
Router send an ICMPv6 neighbor solicitation (NS) message |
|
|
What is the nameof the message the destination device return to the NS message? |
ICMPv6 (NA) Neighbor Advertisment (return its Mac address) |
|
|
What three packet forwarding mechanism routers support? |
Process switching Fast switching Cisco Express Forwarding ( CEF) |
|
|
How does process switching works? |
* Old forwarding mechanism * Packet forward to control plane * CPU match destination at control plane *Then determine an exit interface and forward packet. |
|
|
How does fast switching mechanism works? |
* successor of process switching * Use fast switching cache to store next hop-hop info *CPU search cache upon packets arrival on interface * Forwarded to interface * Cache is reused on future packets |
|
|
How does CEF works? |
* Create FIB(forwarding information Base) & adjacent table with all info router needs * Change - triggered when something changes in Topology *Default on cisco routers and multi layer switch * FIB and adjacent tables build agter network has converged. |
|
|
How to enable IPv6 routing for Ipv6 unicast? |
ipv6 unicast-routing |
|
|
How to verify ipv6 on cisco router? |
show ipv6 interface Gi0/0 |
|
|
How to configure a Unicast Ipv6? |
R1(config)#ipv6 unicast-routing R1(config)#intGi0/0 R1(config-if)#ipv6 address 2001:0BB9: AABB:1234::/64 eui-64 |
|
|
How does hosts check to see if link local IPV6 addresses are Unique and not being used? |
By checking th NDP (neighbor discovery process) |
|
|
How to configure global Ipv6 address as the router's address? |
R2(config-if)#ipv6 address 2001:0BB9:AABB:1234:1111:2222:3333:4444/64 |
|
|
What does a router use to determine best rout for a packet? |
Longest Prefix match |
|
|
While IPV4 uses ARP what does IPV6 use to Resolve MAC Address issues? |
Check its Neighbor Cache. |
|
|
What Happens When IPV6 cannot find a Mac address to match an IP? |
It send an ICMPV6 neighbor solicitation(NS) Message the neighborhood return an NA (neighbor Advertisement) message with its Mac Address. |
