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‘Welcome To The Edge!!!’–What Is Edge Computing???
[Note: This is an evolving, continuously updating post for my research purposes to learn more about SASE, or Secure Access Service Edge. First, I’m laying the groundwork for what ‘edge computing’ is.] Edge Computing The term ‘edge’ is all the rage these days. From a infrastructure-centric point of view, “Edge computing is at it’s essence cloud principles applied at the network edge close to the user“[3]. It can include: Virtualization (Compute virtualization, Storage virtualization, Networking virtualization) Resources On Demand API Driven Approach Automated LCM Life-Cycle management Use of Commodity hardware [3] These are some of the powerful core cloud basic principles that make the network edge highly flexible and programmable.…
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Managing The Network–Advanced IP Networking–NETWORKING, SECURITY, & MORE ESSENTIALS—CompTIA Network+ (N10-007) NETWORK-PLUS Certification Prep Course Notes
Managing The Network Managing Risk What is Risk Management? Security policies are documents with broad overview statements. Security controls provide more details. Procedures discuss specific implementation of policies. Security Policies Security Policies document to users how to access system resources and what is allowable and acceptable. Safety policies apply to the IT department, too! NDA’s, software licensing, & data restrictions need to be considered to protect an organization. A.U.P. (Acceptable Use Policy) What can people do with company equipment?? defines ownership; web-site access; access times; R.A.P. (Remote Access Policy) VPN usage; Authentication rules; Password Policy Complexity; Lockout IT Safety Policy Lifting equipment; Equipment handling; Spills; Procedures; License Restrictions Usage; Transfer;…
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Building a Real-World Network–Advanced IP Networking–NETWORKING, SECURITY, & MORE ESSENTIALS—CompTIA Network+ (N10-007) NETWORK-PLUS Certification Prep Course Notes
Building a Real-World Network Network Types Know the differences between all the “area network” acronyms. Geographical: LAN, WAN, CAN, MAN, Internet; Wireless: WLAN, PAN; Network Design Network design starts with assessing customer needs. Design considerations include documentation, compatibility with existing hardware & software. Bring in security early & make sure to assess external connectivity. Assess current networking infrastructure. Analyze existing network documentation. Assess wireless needs. Power Management UPS–Uninterruptible Power Supply A UPS is a battery back-up & should be used for short-term power loss. Power generators can be diesel or gas, and are used to maintain power for when electric power is not available. Dual power supplies and redundant circuitry…
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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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Virtualization & Cloud Computing–Advanced IP Networking–NETWORKING, SECURITY, & MORE ESSENTIALS—CompTIA Network+ (N10-007) NETWORK-PLUS Certification Prep Course Notes
Virtualization & Cloud Computing Virtualization Basics Don’t confuse virtualization with emulation! Emulation uses software to imitate hardware. Virtualization uses a system’s actual hardware! Recognize the benefits of virtualization. There are two types of hypervisors: Type 1 (bare metal) Type 2 (hosted) Virtualization doesn’t pretend to be anything that it’s not! (Remember, virtualization uses a system’s actual hardware!) Virtualization saves power; & it consolidates hardware; & it makes system recovery easy, & it’s handy for IT research! Hypervisor–V.M.M. (Virtual Machine Monitory) the thing that manages & runs the Virtual Machine for us! Type 2 Hypervisor–runs on top of the host OS. Type 1 Hypervisor–runs directly on top of hardware, independent of…
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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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Internet & The Cloud—NETWORKING ESSENTIALS—CompTIA A+ (220-1001) A-PLUS Certification Prep Course Notes
Internet & The Cloud The Internet Beyond the LAN Local Area Network (LAN) computers share the same network ID. A wide area network (WAN) is two or more LANs interconnected by one or more routers A metropolitan area network (MAN) is a WAN that spans a city. A personal area network (PAN) is a point-to-point connection used only in Bluetooth connections LAN—computers hooked together to one switch (All share identical Network ID) WAN—bunch of LANs interconnected with routers. Each LAN has a unique network ID. CAN—Campus Area Network MAN—Metropolitan Area Network WLAN—Wireless Local Area Network Intranet—private network Internet Tiers The Internet is composed of many organizations that connect to each…