What happens over an Ethernet WAN link? What Data Link addresses appear in the frame that the routers forward over the WAN? What data link headers exist on the WAN link? What types of cabling [...]

WAN connections span much longer distances than LANs – so what happens in that WAN? Even for CCENT and CCNA, you can understand some of the basic facts about how a WAN service provider builds a [...]

The term LAN broadcast may have a specific meaning to you, with the contents of the Ethernet header leaping from your memory. But maybe not. What about the source address? Type field?  Check out [...]

To answer some #CCNA questions, you need to think like a network analyzer (e.g., Wireshark). What values sit in the headers of an Ethernet frame or IP packet? In this next sample question, you’ll [...]

Can you predict the data link addresses in each frame that encapsulates a packet as it flows from source to destination in an IPv4 network? This latest QA requires you to think hard about those [...]

Time for some new practice questions! I’ve not added any new QA in a while, but I plan to get on a roll and add new QA to both the CCENT blog and CCNA blog for a good run of months. The plan: [...]