This is a class C address. The network portion is the first three octets, so it would be 209.240.80.0.
Network Portion Host Portion
It represents the network portion
Servers and workstations Êcan share the same subnet ( a network portion of IP address). However, it is recommended you use different subnetsÊwhen there are several network devices.
Seeing as the IP address of 128.107.10.11 is a class B network, the host portion is 10.11
Thirty bits make up the network portion of a class C address. Three bits are borrowed for the subnet mask. There is also a class A and a class B that are comprised of bits.
Network Portion Host Portion
The host portion specifies the particular network interface's address. The network portion specifies the network address.
When we express an IPv4 network address, we add a prefix length to the network address. The prefix length is the number of bits in the address that gives us the network portion. For example, in 172.16.4.0 /24, the /24 is the prefix length - it tells us that the first 24 bits are the network address. This leaves the remaining 8 bits, the last octet, as the host portion.
It represents the network portion
This is a class C address. The network portion is the first three octets, so it would be 209.240.80.0.
Hosts with the same network portion of their IPv4 address.
32
collision domain
An IP address must be unique within a LAN; the combination of the network and host portion must present a number that is not duplicated anywhere else in the network. Outside of a LAN the IP addresses do not have to be unique, except that the network id portion can only be used by the organization that owns the IP network address. The host portion does not need to be unique across all LANs within an enterprise network.
modular router
Only the Network Layer (Layer 3) portion of the datagram is used by the Network Layer (Layer 3) portion of the TCP/IP Model. The network portion of the datagram includes IP Addressing information, and things such as TTL (Time to Live), and Datagram Priority markings.
It is a class B address (The first three numbers (octet) are between 128 and 191), meaning it has a subnet of 255.255.0.0, thus, 129.219 is the network portion, with 51.18 representing the host portion.