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Web intro

Idealistic Canadian video: How Does the Internet Work ?

A network is two or more computers connected. The internet is network of networks.

What’s in a URL:

  • https://example.com/about?key=value#anchor
  • protocol + domain name (or IP, optional port :80) + path + query / parameters + fragment/anchor

Demo IP addresses:

  • ping www.google.com
  • nslookup www.lib.uidaho.edu
  • traceroute / tracert / tracepath tracepath www.google.com

Check content of certificate file:

  • openssl x509 -in libcal_uidaho_edu_cert.cer -noout -text