Subtitles for CompTIA A+ 1201 Network Hardware Secrets (Obj. 2.5)

We're on objective 2.5, comparing and contrasting common networking hardware devices. Let's get familiar with the essential building blocks of any network. Think of your network as a bustling city. Routers are the traffic cops sitting at layer 3 guiding data packets between different network neighborhoods or IP subnets using IP addresses stored in their routting tables. They are versatile connecting different types of networks like your home lan to the internet. Sometimes a high-end switch with routing capabilities known as a layer 3 switch can perform these functions too. Within a single local network, switches are the efficient street directors. They connect your wired devices, computers, printers, servers, forwarding traffic rapidly within the len based on physical MAC addresses. They use specialized hardware called A6 for high-speed performance and can have many ports. We have two main types. Unmanaged switches are your basic plug-and-play option, like a simple power strip for your network cables. They require no configuration. They're great for small, simple setups, but offer no advanced features like VLANs or remote management. Managed switches, on the other hand, are the smart controllers for larger networks. They offer powerful features like creating VLANs to segment traffic into different virtual networks. Quality of service QoS to prioritize important traffic like voice or video. Support for redundancy protocols like spanning tree to prevent network loops and port mirroring which copies traffic from one port to another for monitoring. Plus, you can configure and manage them remotely. Access points APs act as a bridge translating signals between your wired Ethernet network and your wireless devices. Unlike many home wireless routters, a dedicated AP doesn't typically perform routting itself. It extends the wired network wirelessly, making forwarding decisions based on MAC addresses. To keep office wiring organized, we use patch panels. Think of a central switchboard in your network closet. Permanent cables from wall jacks run to the back of the patch panel. Then short flexible patch cables. Connect the front ports of the panel to your switches. This makes it easy to reconfigure connections without rerunning long cables through walls. Protecting your network city are firewalls. Traditional firewalls act like basic guards filtering traffic based on port numbers and IP addresses. Next generation firewalls, NGFWs or UTM unified threat management devices are much smarter security guards. They inspect the actual content and applications offering features like intrusion prevention, anti-malware and content filtering. Many firewalls also function as VPN concentrators for secure remote access or even as routers. Ever powered a device through its network cable? That's power over Ethernet or PoE. It's like a special Ethernet cable that delivers both data and electricity. Perfect for devices like security cameras, VIP phones, or wireless APS in locations without power outlets. Power can be supplied by a PoE capable switch called NSPAN or in span power or by adding a PoE injector, a midspan device to an existing non-PoE network line. There are different PoE standards. The original PoE 802.3 AAF provides up to about 15 watts. Good for basic phones. POEI plus 802.3 at offers up to about 30 watts for devices like pan tilt zoom cameras and POE plus 802.3BT provides even more 60 to 100 W for hungrier devices. Higher standards are generally backward compatible. Now for connecting to the internet, a cable modem is your gateway if internet comes via your TV cable provider. Using the DOCIS standard to translate cable signals to Ethernet, these are known for high speeds. DSL or digital subscriber line provides internet over traditional copper phone lines. DSL speed is very dependent on your distance from the phone company's central office. If you have superfast fiber optic internet, an optical network terminal or is the device that converts those light signals into usable Ethernet for your router or computer. The is typically located at the demarcation point or to mark the boundary where your ISP's network responsibility ends. Finally, the fundamental piece for wired network connection on any device is the network interface card or nick. It's your devices network passport. Nicks can be built into the motherboard or added as expansion cards. Every single nick has a unique permanent hardware address burned into it called a MAC address, media access control address. Switches use these MAC addresses to precisely deliver data frames to the correct device on the local network segment. Understanding these hardware pieces and their distinct roles is crucial for A+ networking. That's a wrap for Objective 2.5. Stay tuned for more. Thanks for joining TechVault Academy. [Music]