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A type of printer that converts text and image files and prints it onto a sheet of paper using solenoids. Printing Process Solenoids are little coils that are in the print head. During the printing process, they get really hot, hot enough to burn you. The sole...

A communication protocol for mobile devices that facilitate data transfers. NFC is typically used for cellphone-to-cellphone communication and contactless credit card transactions (Tap to Pay).

Evolved High Speed Packet Access (HSPA+). An extension of the 3G cellular network technology. It provides an increase in data throughput and wireless link range without needing additional bandwidth or increased transmit power.

An extension of the 3G cellular network technology, which uses smart antennas to improve the performance of radio systems. MIMO uses multiple reception and transmission antennae to boost bandwidth via spatial multiplexing to boost range and improve signal reli...

An extension of the 3G cellular network technology. It increased downlink/uplink speeds to 100/50 Mbps.

Successor to LTE. Increased downlink/uplink speeds to 1 Gbps/500 Mbps.

The international governing body that manages all IP addresses used ever. IANA is owned by the Internet Corporation for Assigned Names and Numbers. IANA manages Regional Internet Registries (RIRs), which then allocate blocks of IP addresses to local ISPs. An R...

A collection of software on a computer that allows the user to access and use the computer's memory, file system, process, hardware & software, and program applications. Components Kernel Utilities Interfaces Software Programs Common OSs Microsoft-Windows A...

aliases: UDP A connectionless protocol that sends packets to the receiver regardless of checking for receipt. UDP is a connectionless, nonguaranteed method of communication that has no acknowledgements or flow control. There is no way to confirm the delive...

aliases: TCP Transmission Control Protocol: connection oriented data transfer protocol that ensures that every packet sent is received before sending the next one. TCP runs at the Transport layer. Three-Way Handshake This is the fundamental process that tw...

The international governing body that manages all IP addresses used ever. IANA is owned by the Internet Corporation for Assigned Names and Numbers. IANA manages Regional Internet Authorities (RIRs), which then allocate blocks of IP addresses to local ISPs. An ...

An addressing system in place to use special IP addresses when something goes wrong with the DHCP server or with the host that needs it. APIPA addresses always begin with 169.254.x.x. APIPA is triggered when a DHCP server takes too long to offer an IP address ...

A document or collection of documents that provide information about how the organization structures its network security settings. It might include: A Password-Policy A Backup-Policy An Acceptable-Use-Policy A Physical-Security-Policy A User-Education-&-Awar...

aliases: TLD The ending of most web domain names. Domain Purpose .org Non-Profit Organization .com Commercial Entity .edu Educational Institution .gov Government Entity .tv Television & Entertainment .net Networking-based Company .mil Mi...

aliases: DKIM An email authentication protocol that detects and blocks spoofed emails by validating the sender's domain address. #XI

aliases: SPF An email authentication protocol detects and blocks spoofed emails by validating the sender's domain address and by double-checking the IP of the sender's domain. If the sent domain's IP doesn't match one in the DNS records, the email is block...

aliases: DMARC An email authentication protocol that combines the functionality of DKIM and SPF, while adding the ability to specify what happens to flagged emails, whether they're deleted or set aside in a sort of a 'spam' mailbox. #XI

An enumeration and description of the three major email protocols. Sending and receiving emails is surprisingly complicated. Luckily, I've covered the basics of SMTP, IMAP and POP3 over here. SMTP The one that sends emails. IMAP The first one that receives ema...