Cisco CCNA Certification: Broadcasts, Unicasts, And Multicasts
Whenever you start your CCNA research, you get hit with lots of completely different networking terms straight away that you just won’t be familiar with. What makes it slightly more confusing is that loads of these phrases sound lots alike. Right here, we’ll focus on the variations between broadcasts, multicasts, and unicasts at each the Data Hyperlink (Layer 2) and Community (Layer three) layers of the OSI model.
A broadcast is simply an unit of knowledge that each different device on the phase will receive. A broadcast is indicated by having each little bit of the handle set to its highest potential value. Since a hexadecimal bit’s highest value is “f”, a hexadecimal broadcast is ff-ff-ff-ff-ff-ff (or FF-FF-FF-FF-FF-FF, as the upper case doesn’t affect hex value). The CCNA exam will demand you be very aware of hex conversions, so if you’re not comfortable with these conversions, get snug with them before taking the exam!
Tags: ccna certification, ccna exam, cisco certification, hex value, multicast group, multicast groups, networking terms, osi model, unicast, upper case