Subnetting Flashcards
Multicast address range
224.0.0.0-239.239.255.255.255
Private address ranges
- 0.0.0-10.255.255.255
- 16.0.0-172.31.255.255
- 168.0.0-192.168.255.255
Use of broadcast addresses
Requesting an address
Exchanging routing information by routing protocol
Mapping upper layer addresses to lower layer address
Reserved local link local address range (on local network)
224.0.0.0-224.0.0.255
Globally scoped address range (across Internet)
224.0.1.0-238.255.255.255
Ex: network time protocol (224.0.1.1)
Limited broadcast
Broadcast to local network 255.255.255.255
Directed network
Broadcast towards specific network
Ex: 172.16.4.0/24
172.16.4.255
Uses of multicast
News feeds
Distribution software
Video, audio distribution
Apipa
169.254.0.0/16 address block
When dhcp is not avail
Default routes…
0.0.0.0/8
Loop back block
127.0.0.0-127.255.255.255
Use structured process because
Prevents address duplication
Monitors security and performance
Providing and controlling access
Tier 1 ISP
Internet backbone
Tier 2 ISP
Business customers
Tier 3 ISP
Retail, home markets
Ipv6 address
128 bit hierarchical addressing
Anding
Used to determine an acceptable route for an incoming packet; helps determine network address using host address and subnet mask
Ping 127.0.0.1
Indicates ip is properly installed on host
Ping
Responds with icmp echo reply; time of each response is indicator of network performance
Icmp may include:
Host confirmation
Unreachable destination or service
Ttl
Source quench: tells source to stop sending packets or datagrams
Route redirection: abetter route is avail
Unreachable dest
0 net unreachable
1 host unreachable
2 protocol unreachable
3 port unreachable
