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    Routing–The World of TCP/IP–NETWORKING, SECURITY, & MORE ESSENTIALS—CompTIA Network+ (N10-007) NETWORK-PLUS Certification Prep Course Notes

    May 13, 2021 /

    Routing Introducing Routers Routers only care about destinations. Routers interconnect Network IDs. Routers can use any network medium! Routes are not tied to Ethernet; They can have DSL, Fiber-Optic connections, etc. All routers have a routing table! A routing table will have at least 4 columns: Address, Subnet, Gateway, & Interface. A router is a box that connects network IDs. Routers filter & forward based on IP address (Remember, “switches” filter & forward based on MAC address.) Default Routes have “Address” and “Subnet” data of “0.0.0.0” The primary job of a router is to connect networks with different network IDs. Understanding Ports Understanding Ports Port numbers identify the sending &…

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    Aaron Comments Off on Routing–The World of TCP/IP–NETWORKING, SECURITY, & MORE ESSENTIALS—CompTIA Network+ (N10-007) NETWORK-PLUS Certification Prep Course Notes

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    Portable Computing Security & More–NETWORKING, SECURITY, & MORE ESSENTIALS—CompTIA A+ (220-1001) A-PLUS Certification Prep Course Notes

    May 11, 2021

    Blockchain & Money: Session 6: Smart Contracts & DApps by M.I.T. Sloan School of Management with Professor Gary Gensler

    April 15, 2021
  • Tech

    TCP/IP Basics–The World of TCP/IP–NETWORKING, SECURITY, & MORE ESSENTIALS—CompTIA Network+ (N10-007) NETWORK-PLUS Certification Prep Course Notes

    May 12, 2021 /

    TCP/IP BASICS Intro to IP Addressing & Binary Each computer on a TCP/IP network must have a unique IP address. IPv4 addresses are written as four octets, such as: 192.168.4.12 Each octet represents a binary string; 192, for example, is represented by 11000000 Dotted decimal notation–shorthand used to represent the 32 1’s & 0’s. 28 (256) combinations Each octet is valued between 0 and 255. Converting from binary to dotted decimal: Intro to ARP APR (Address Resolution Protocol) resolves IP addresses. ARP is what a computer uses when it knows the IP address, but needs the MAC address. Type ‘arp -a’ to see the ARP cache (shows a list of…

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    Aaron Comments Off on TCP/IP Basics–The World of TCP/IP–NETWORKING, SECURITY, & MORE ESSENTIALS—CompTIA Network+ (N10-007) NETWORK-PLUS Certification Prep Course Notes

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    Defining a Member Function With a Parameter-–C++ Notes (C Plus Plus Notes)

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    WSJ–“Companies Urged to Adjust Hiring Requirements for Cyber Jobs”…

    December 30, 2020

    Printers & Multifunction Devices—NETWORKING ESSENTIALS—CompTIA A+ (220-1001) A-PLUS Certification Prep Course Notes

    May 9, 2021
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