Unit 3: Network Hardware

• store forward occurs when a switch receives a data frame and its entirety , checks for errors , and then forwards the frame
• cut through occurs when a switch just needs to know the frame header that has the destination MAC address , and then it sends the frame
• managed switches can be configured : have an IP address set , security settings , and are not configurable
• uplink ports are usually a faster port meant specifically to chain switches together for a larger address space
• virtual VLANs can be established by allocating a certain number of physical parts to a logical network
• a trunk line can connect two switches in different physical locations to create the same VLAN
• crossover cable connects to the same device
• straight through cables connect devices of different types
• backplane speed refers to the total throughput for a switch at a given time
• STP / 892.1D original STP
• PVST+ cisco improvement of STP adding a per VLAN STP
• RSTP / 802.1w improved STP with much faster convergence
• disable is when a port is shutdown
• blocking is when a port is blocking traffic
• listening is when a port is not forwarding traffic and not learning the MAC address
• learning is when a port is not forwarding
• static routing and command examples is a static route designated by an administrator for information to go through a specific router or a set of routes
• network segmentation is the act of physically and or logically breaking up a network into smaller networks
• twisted pair cable is made of twisted pairs of copper wire , twisted around their corresponding color pairs , and then around each other within their shield
• fiber optic cable can be used for high speed LAN connection