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Seventh Video in a Series covering all elements of Cisco Certified Network Associate (200-301 CCNA) Continuing with the OSI model overview, we start with reviewing the application, presentation, session and transport. Then move into network, data-link and Overview: OSI Overview: Networking Layer Routing protocols: These are protocols which routers use to exchange routes/subnets with one another. Protocols which sit here are RIP, EIGRP, OSPF, BGP etc. Routed protocols: These are protocols which routers exchange: IPv4, IPv6, IPX, Appletalk, ICMP etc. At the networking layers we're introduced to a key piece of hardware called a router, briefly understand what is an IP address, and last but not least don't forget a PDU for the Network Layer is a Packet Data-Link Layer Most common L2 Protocol is Ethernet which uses MAC address, also called: Burned in address, Physical Address, Hardware address. These are 48 bit addresses represented in Hexadecimal half of which is used for the OUI. Other Protocols at the DL layer include: PPP, HDLC, ATM, ARP and many more also, don't forget a PDU for DL Layer is a Frame. Switches tend to work at DL Layer but can work at many layers within the OSI depending on their capabilities Physical Layer The physical layer defines the electrical, mechanical, procedural, and functional specifications for activating, maintaining, and deactivating the physical link between communicating network systems. Physical layer specifications also define characteristics such as voltage levels, timing of voltage changes, physical data rates, maximum transmission distances, and physical connectors. Physical layer implementations can be categorized as either LAN or WAN specifications. If you find this video to be helpful, please do leave a Like or better still, subscribe. This allows me to establish how helpful these videos are and if I should continue with this video series The course itself will cover everything required to pass your CCNA 200-301 exam Full course: 📚Books! 🎓🎓 CCNA 200-301 Official Cert Guide - My fav books: Routing TCP/IP Volume I (CCIE Professional Development): Authorized CCIE Preparation: v. 1 - Routing TCP/IP (CCIE Professional Development): Volume 2 - Learn all about TCP: - Another great TCP book - 📚Books 🎓🎓 Cisco CCNA Course Cisco CCNA 200-301 CCNA 200-301 Training CCNA 200-301 Full Course CCNA 200-301 Study CCNA 200-301 Tutorials CCNA 200-301 Full Course 👍👍 Thanks for Watching 👍👍 Want to give back? ☕ Buy me a Coffee - You can find me on: ✉✉ Twitter - @RyanBeney - Linkedin - /RyanBeney - Facebook - /RyanBeneyNetworking - #FreeCCNA #CCNA #Ryanbeney
