EXERCICE VLSM CORRIG PDF

What is VLSM? VLSM allows an organization to use more than one subnet mask within the same network address space. It is often referred to as subnetting a subnet, and can be used to maximize addressing efficiency. Large subnets are created for addressing LANs and small subnets are created for WAN links a 30 bit mask is used to create subnets with only two host. CCNA v3.

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What is VLSM? VLSM allows an organization to use more than one subnet mask within the same network address space. It is often referred to as subnetting a subnet, and can be used to maximize addressing efficiency.

Large subnets are created for addressing LANs and small subnets are created for WAN links a 30 bit mask is used to create subnets with only two host.

CCNA v3. Subnetting vs. VLSM Subnetting allows you to divide big networks into smaller, equal-sized slices. VLSM allows you to divide big networks into smaller, different-sized slices. This enables you to make maximum use of your valuable IP address space. How many network addresses are needed? How many hosts are needed for the largest LAN?

How many bits need to be borrowed to address this network? Addressing a Network with Standard Subnetting Borrowing 3 bits will meet the current needs of the company, but it leaves little room for growth. Each network will have 30 usable addresses, including the point-to-point WAN links which only require two addresses.

Subnetting in a Box To begin, in a class C network there are addresses. When we subnet the address, we break it down in to smaller units or subnets.

Subnetting in a Box If we were to borrow 1 bit, it would break the addresses in to two parts networks with each part subnet having addresses. The subnet mask would be Subnetting in a Box If we were to borrow 2 bits, it would break each of these 2 networks in half again. This would give us 4 networks, each with 64 addresses.

The subnet mask would now be Subnetting in a Box If we were to borrow 3 bits, it would break each of these 4 networks in half again. This would give us 8 networks, each with 32 addresses.

Subnetting in a Box If we were to borrow 4 bits, it would break each of these 8 networks in half again. This would give us 16 networks, each with 16 addresses. A different subnet mask may be applied to some of the subnets to further subnet the address. In order to take advantage of VLSM, the proper routing protocol must be selected. Not all routing protocols share subnetting information in their routing table updates.

Subnet the address Subnet 6 can be subnetted to accommodate the WAN links. Sub-subnet 0 Be sure to include the number of bits borrowed ex. Headquarters 60 users ISP.

Given the IP address This would give you 4 networks with 64 host addresses on each subnet. Headquarters needs 60 hosts, so we will assign them.

The 5 Branch offices only need 12 hosts each. The next address block available is the. Here we will apply VLSM. This will take care of 4 of the Branch offices. Now we need to address the 5 WAN links that connect to the Branch offices. These are point-topoint connections and only require 2 addresses.

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Activity 6. Design an appropriate addressing scheme using VLSM. In this activity, you have been given the network address All contents are Copyright?

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