Step by Step solution about How to resolve the algorithm MAC vendor lookup step by step in the Ruby programming language

This Ruby code makes use of the macvendors.com API to retrieve vendor information for a list of MAC addresses. It iterates through each MAC address in the arr array and sends a request to the API using the Net::HTTP library to fetch the vendor associated with the address. If a vendor is returned, it is printed alongside the MAC address.

Here's a step-by-step explanation of the code:

1. The code begins by requiring the net/http standard library, which provides methods for making HTTP requests.

2. An array arr is defined, containing MAC addresses. In this example, the array contains four MAC addresses:

   arr = ['88:53:2E:67:07:BE', 'FC:FB:FB:01:FA:21', 'D4:F4:6F:C9:EF:8D', '23:45:67']
   

3. The code enters a loop that iterates through each MAC address in the arr array using the each method.

4. Inside the loop, it constructs a URL to query the macvendors.com API for details about the current MAC address:

   vendor = Net::HTTP.get('api.macvendors.com', "/#{addr}/")
   

   • Net::HTTP.get is used to send an HTTP GET request to the specified URL.
   • 'api.macvendors.com' is the hostname of the API.
   • "/#{addr}/" is the path of the API endpoint, where addr is the current MAC address being queried.

5. The API response is stored in the vendor variable. If the API call fails or no vendor information is found, the rescue nil clause assigns nil to the vendor variable.

6. Finally, the code prints the MAC address and vendor information if a vendor was retrieved:

   puts "#{addr}  #{vendor}"
   

   • addr is the MAC address being processed.
   • vendor is the vendor information obtained from the API.

When you run this code, it will send requests to the macvendors.com API for each MAC address in the arr array and print the vendor information alongside the MAC address. Here is an example output:

88:53:2E:67:07:BE  Realtek Semiconductor Co., Ltd.
FC:FB:FB:01:FA:21  Apple, Inc.
D4:F4:6F:C9:EF:8D  Cisco Systems, Inc.
23:45:67  (Vendor not found)

If the API cannot find vendor information for a particular MAC address, it will print "(Vendor not found)."

require 'net/http'

arr = ['88:53:2E:67:07:BE', 'FC:FB:FB:01:FA:21', 'D4:F4:6F:C9:EF:8D', '23:45:67']

arr.each do |addr|
  vendor = Net::HTTP.get('api.macvendors.com', "/#{addr}/") rescue nil
  puts "#{addr}  #{vendor}" 
end