Intro to Cisco Networking - Modules 11, 12, & 13
Destination Unreachable Code for ICMPv4 (ping)
0 - Network unreachable 1 - Host unreachable 2 - Protocol unreachable 3 - Port unreachable
Destination Unreachable Code for ICMPv6 (ping)
0 - No route to destination 1 - Communication with the destination is administratively prohibited (e.g., firewall) 2 - Beyond scope of the source address 3 - Address unreachable 4 - Port unreachable
Private IPv4 addresses
10.0.0.0 - 10.255.255.255 172.16.0.0 - 172.31.255.255 192.168.0.0 - 192.168.255.255
IPv4 Multicast Addresses
224.0.0.0 - 239.255.255.255
type of IPv4 address: 240.2.6.255
Experimental address
Tunneling
IPv6 packet is transported into an IPv4 packet
Dual-stack
IPv6 packets and IPv4 packets co-exist in the same network
Translation
IPv6 packets are converted into Ipv4 packets and vice-versa
Prefix reserved for communication between devices on the same link
Link-local addresses, FE80::/10
type of IPv4 address: 127.0.0.1
Loop back
type of IPv4 address: 172.19.20.5/12
Private address
ICMPv6
Protocol that supports SLAAC for dynamic assignment, sends messages verifying packet delivery
type of IPv4 address: 169.254.1.5
Reserved address - cannot see network
SLAAC
Stateless Address Auto-configuration: service that provides dynamic global IPv6 addressing to end devices without using a server that keeps a record of IPv6 addresses.
type of IPv4 address: 192.0.2.123
TEST-NET address
Address: FF02::1
Type: all node multicast address. Packets sent to this address will be received by all IPv6 hosts on the local link.
Address: 2001:DB8:BAF:2F57:FE94
Type: global unicast address
Address: ::1
Type: loopback
Address: FF02::1:FFAE:F85f
Type: solicited node multicast
host transmitting a multicast
a specially defined group of hosts
host transmitting a broadcast
all hosts of the same subnet
Type of IPv6 address that refers to any unicast address that is assigned to multiple hosts
anycast
limited broadcast
communicates a message that is limited to the hosts on the local network
Two types of IPv6 unicast addresses
loopback and link-local
directed broadcast
message is sent to all hosts on a specific network
unicast message
message sent from one host to another
multicast message
message sent to a selected group of hosts that are part of a subscribing multicast group
host transmitting a unicast
one specific host