network technician is responsible for an extensive enterprise network. The network has hundreds of hosts on the same broadcast domain, reducing performance. The technician needs to find a solution to improve security and mitigate excessive broadcast traffic. What is the solution?a.Virtual LAN (VLAN)b.Virtual private network (VPN)c.Sender Policy Framework (SPF)d.Domain Keys Identified Mail (DKIM

The solution to improve security and mitigate excessive broadcast traffic in an extensive enterprise network with hundreds of hosts on the same broadcast domain is a.Virtual LAN (VLAN).

Here's why:

Step 1: Understanding the problem The problem here is twofold - security and excessive broadcast traffic. In a large network with hundreds of hosts on the same broadcast domain, every packet sent by a host is received by every other host. This not only reduces performance (due to excessive traffic) but also poses a security risk (since all hosts can see all packets).

Step 2: Evaluating the options a. Virtual LAN (VLAN): A VLAN allows you to segment a network into different broadcast domains. Each VLAN is a separate network, and packets can only be sent and received by hosts within the same VLAN. This reduces traffic and improves security. b. Virtual private network (VPN): A VPN is used to create a secure connection to another network over the Internet. It doesn't help in reducing broadcast traffic within a network. c. Sender Policy Framework (SPF): SPF is a method used to prevent email spoofing. It doesn't help in reducing broadcast traffic or improving network security. d. Domain Keys Identified Mail (DKIM): DKIM is an email authentication method. It doesn't help in reducing broadcast traffic or improving network security.

Step 3: Selecting the best solution Based on the evaluation, the best solution is a. Virtual LAN (VLAN). By segmenting the network into different VLANs, you can reduce broadcast traffic and improve security.