What is a periodic and non periodic signal in data communications?
What are the physical layer devices in network? Give me the types of physical layer devices.
What is twisted-pair cable? And what are the types of twisted-pair cables?
What are Network support layers and user support layer in OSI model?
What is the defintions for unicast address, multicast address and broadcast address?
What are the network protocols used at the data link layer of the OSI model? These terms used in the CCNA exam and I am following a CCNA course and if you can give me the answers it really helpful for me.