Class Activity 7
Name: JAIME GARCIA
Week #: 4
Date: 09/22/2014
VLSM, and CIDR are stop gap measures to relieve the IPv4 addresses shortages and simplify routing database. IPv6 does solve the problems by providing 128 bits address space and the subnetting is not needed. Besides address shortage, VLSM does provide flexibility and scalability for networking addressing management. For CIDR, it can help to simply routing data base. Talk about some of the advantages for this post. No all the routing protocols support VLSM, and CIDR. How can we guarantee VLSM and CIDR will work in our networks. Comment.
Classless Inter-Domain Routing (CIDR) allows a single IP address and subnet to be used to reference a group of addresses. The address is called "Classless" because it ignores the "Classful" conventions that define three classes of addresses: A, B and C. With CIDR, between 13 and 27 bits of an IP address can refer to the network segment while the remaining bits refer to the host portion. For example, in the case of 27 bits, this would result in a network segment with 30 hosts (2 to the power of (32-27) -2).
CIDR offers major benefits:
Fewer entries are needed in routing tables since several contiguous network segments can be aggregated into one IP address
CIDR makes more IP addresses available. Dispensing with the rigid rules of classful addressing makes different combinations of network segment / host number pairings possible.
A CIDR address uses notation that takes the form of w.x.y.z/s, as in 192.168.8.0/20 where the "/20" indicates the number of bits that mask off the network portion of the address. Note that in this example that the subnet mask is shorter than the one used for the standard classful address.
One of the main uses of CIDR is to optimize routing tables. For example, let's assume that four contiguous Class C networks, 192.168.12.0/24 to 192.168.15.0/24, are reachable via a single router. Instead of needing four routing table entries to describe the routes to these
Week #: 4
Date: 09/22/2014
VLSM, and CIDR are stop gap measures to relieve the IPv4 addresses shortages and simplify routing database. IPv6 does solve the problems by providing 128 bits address space and the subnetting is not needed. Besides address shortage, VLSM does provide flexibility and scalability for networking addressing management. For CIDR, it can help to simply routing data base. Talk about some of the advantages for this post. No all the routing protocols support VLSM, and CIDR. How can we guarantee VLSM and CIDR will work in our networks. Comment.
Classless Inter-Domain Routing (CIDR) allows a single IP address and subnet to be used to reference a group of addresses. The address is called "Classless" because it ignores the "Classful" conventions that define three classes of addresses: A, B and C. With CIDR, between 13 and 27 bits of an IP address can refer to the network segment while the remaining bits refer to the host portion. For example, in the case of 27 bits, this would result in a network segment with 30 hosts (2 to the power of (32-27) -2).
CIDR offers major benefits:
Fewer entries are needed in routing tables since several contiguous network segments can be aggregated into one IP address
CIDR makes more IP addresses available. Dispensing with the rigid rules of classful addressing makes different combinations of network segment / host number pairings possible.
A CIDR address uses notation that takes the form of w.x.y.z/s, as in 192.168.8.0/20 where the "/20" indicates the number of bits that mask off the network portion of the address. Note that in this example that the subnet mask is shorter than the one used for the standard classful address.
One of the main uses of CIDR is to optimize routing tables. For example, let's assume that four contiguous Class C networks, 192.168.12.0/24 to 192.168.15.0/24, are reachable via a single router. Instead of needing four routing table entries to describe the routes to these