Many folks have questions about what cable to use. This article explains the different cables, the construction, and their standards:
What Kind of Ethernet (Cat5, Cat5e, Cat6, Cat6a) Cable Should I Use? (howtogeek.com)
This article discusses faulty cables. Many folks post threads asking about connectivity issues and this article discusses some of those problems:
Is Your Ethernet Cable Faulty? Signs to Watch Out For (howtogeek.com)
What Kind of Ethernet (Cat5, Cat5e, Cat6, Cat6a) Cable Should I Use? (howtogeek.com)
This article discusses faulty cables. Many folks post threads asking about connectivity issues and this article discusses some of those problems:
Is Your Ethernet Cable Faulty? Signs to Watch Out For (howtogeek.com)