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Mobile Networking–Advanced IP Networking–NETWORKING, SECURITY, & MORE ESSENTIALS—CompTIA Network+ (N10-007) NETWORK-PLUS Certification Prep Course Notes
Mobile Networking Cellular Technologies Mobile communication can use cellular towers which have a range of over 17 miles. Cellular WAN has developed several standards to handle data traffic. Mobile protocols include: HSPA–3G, HSPA+–4G, and LTE. WiMax–extension of Wi-Fi networks; uses the 802.16 standard for more range than the 802.11 standard. HSPA (High Speed Packet Access)–single Mbps range 3G technology. HSPA+–multiple Mbps range; considered a 4g technology. LTE–ten’s of Mbps range; 4G technology. Tethering–using the cell phones signal to get other devices online. Can be wired or wireless (hotspot). Mobile Connectivity ANT/ANT+ are used for health applicances (e.g.-monitoring; workout equipment; heart-rate monitors; watches), run in 2.4GHz band, range is 20-30 meters,…
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Wireless, Virtual, Cloud, & Mobile Networking–Advanced IP Networking–NETWORKING, SECURITY, & MORE ESSENTIALS—CompTIA Network+ (N10-007) NETWORK-PLUS Certification Prep Course Notes
Wireless, Virtual, Cloud, & Mobile Networking Wireless Networking (Note:Ad-hoc networks are Wi-Fi networks comprised only of peer computers.) Intro To 802.11–uses radio waves to transmit info between nodes. A WAP (Wireless Access Point) is a bridging device that connects into an Ethernet network & communicates via radio waves to wireless clients. A WAP has a SSID (Service Set Identifier), a word or phrase used to connect wireless devices to the WAP device. CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) is the method used to prevent wireless collisions. Almost all devices & gadgets today have wireless NICs built-in to them! 802.11 Standards Early wireless standards were 802.11b (2.4-GHz) and 802.11a…
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Portable Computing Security & More–NETWORKING, SECURITY, & MORE ESSENTIALS—CompTIA A+ (220-1001) A-PLUS Certification Prep Course Notes
Portable Computing Security & More The Internet Telnet & SSH The Telnet and the Secure Shell (SSH) protocols provide command line access to remote systems. Telnet runs on TCP port 23; SSH runs on TCP port 22. Telnet is unencrypted; SSH is encrypted. Telnet uses Port 23. Telnet: One of the earliest application protocols; allows access to another computer; A remote command line tool; a powerful tool; allows you to get to the command line on another comuter. To access a Telnet server, you need a Telnet client (similar to how in order to access a web server you need a web client, aka–web browser). Putty is a popular Telnet…
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