Ospf is an IGP, or an interior gateway protocol. The bullet on OSPF of the CCNA blueprint is to configure and verify a single area OSPFv2. The sub bullets will describe how to do that. 3.4 Configure and verify single area OSPFv23.4.a Neighbor adjacencies3.4.b Point-to-point3.4.c Broadcast (DR/BDR selection)3.4.d Router ID OSPFv1 is old and not … Continue reading 25% 3.0 IP Connectivity 3.4 Configure and verify single area OSPFv2 (CCNA) →

Tcp and udp are layer 4 of the OSI model. Tcp is the "transmission control protocol. Udp is the user datagram protocol. So you have physical, data link, network, and then transport layer, which is where tcp and udp reside. Some basic differences are: tcp is reliable, udp is unreliable. Tcp is "thick" and udp … Continue reading 20% 1.0 Network Fundamentals 1.5 Compare TCP to UDP →

Interface and cable issues are physical problems.  Physical problems can manifest themselves with latency, or slowness issues, for example taking forever to browse the internet, or choppy video, or an IP phone with unrecognizable voice.  This means frames are dropped or have been corrupted.  The command "show interface" on a Cisco switch, or router, can … Continue reading 1.0 Network Fundamentals. 20%. 1.4 Identify interface and cable issues (collisions, errors, mismatch duplex, and/or speed) →

POE, or power over ethernet, is a technology that allows devices that require dc voltage to receive their power over ethernet cabling. Switches with POE capability use the copper cabling to deliver ethernet connectivity but also the power that is required, for devices such as wireless access points and voice over ip phones. Throughout the … Continue reading 1.0 Network Fundamentals. 20%. 1.3 Compare physical interface and cabling types. 1.3.c Concepts of POE. →

Explain the role and function of network components. On premises, is how everything used to be. An organization would have a data center or server room where all the servers were housed and connected to the network. Gradually, cloud networking started becoming popular. Cloud networking is a broad term and there are different varieties. The … Continue reading 1.0 Network Fundamentals. 20%. 1.2 Describe characteristics of network topology architectures. 1.2.f On-premises and cloud. →

Explain the role and function of network components. A small office/home office is a remote site that connects to the HQ with a WAN. It will be a small representation of an enterprise network, with a border router, firewall, and local area network, where the endpoints connects to the network. See below: The modem/border router/firewall … Continue reading 1.0 Network Fundamentals. 20%. 1.2 Describe characteristics of network topology architectures. 1.2e Small office/home office (SOHO) →

WAN, stands for Wide Area Network. It is different from LAN, or local are network, in that it covers a "wide area" instead of just the local area. A local area being a core of a town, or a headquarters building, for example, and a wide area being a remote site across the street, or … Continue reading 1.0 Network Fundamentals. 20%. 1.2 Describe characteristics of network topology architectures. 1.2.d WAN. →

Spine-leaf design was created to address data center issues. The previous designs, 2-tier and 3-tier were used before Spine-leaf came out. The challenge with the two previous designs is spanning tree issues and first hop redundancy configuration issues. With spine-leaf those issues are removed. The reason is because of the new technologies in the spine-leaf … Continue reading 1.0 Network Fundamentals. 20%. 1.2 Describe characteristics of network topology architectures. 1.2.c Spine-leaf →

Describe characteristics of network topology architectures, 3 tier design. A 3 tier design is the classic, core, distribution, and access layer design, where the core is fast switching, distribution is aggregation and segmenting of networks, policies applied, access control lists, qos etc. Access layer is where the endpoints connect to the network at layer 2. … Continue reading 1.0 Network Fundamentals. 20%. 1.2 Describe characteristics of network topology architectures. 1.2.b 3 tier. →

1.2.a 2 tier A 2 tier network or sometimes called a "collapsed core" network involves the core and distribution layer or "tier" together in one layer or tier, and the access layer in the other layer or tier. See below: In the classic network design, the core is the big, fast switches, the distribution is … Continue reading 1.0 Network Fundamentals. 20%. 1.2 Describe characteristics of network topology architectures. 1.2.a 2 tier →