Layer Up (OSI)
This physical component, goes by Cat5 or Cat6, connects devices like routers, computers, and switches together.
What is Ethernet Cable?
127.0.0.1 is universally known by this cozy name used to refer to your own device.
What is localhost or loopback address?
You use this basic command line tool to test if a remote server or IP address is reachable.
What is ping?
HTTP web traffic typically travels over this well-known port number by default
What is Port 80?
This layer of the OSI model is responsible for routing data packets using IP addresses
What is Network Layer?
This protocol automatically assigns IP addresses to devices when they join a Wi-Fi network so you don't have to enter them manually.
What is DHCP?
This network hardware device operates at Layer 2 to connect devices within the exact same Local Area Network (LAN).
What is a Switch?
This famous web browser error code means "File or Page Not Found."
What is Error 404?
This 4-step handshake protocol ensures reliable, error-checked data delivery across a network.
What is TCP (Transmission Control Protocol)?
In IPv4, this series of four numbers separated by dots (like 255.255.255.0) defines where the network portion of an address ends and the host portion begins. What is the term for this separation?
What is a Subnet Mask?
This hardware address, permanently burned into a device's network card, consists of 12 hexadecimal digits.
What is a MAC Address?
This type of security barrier monitors incoming and outgoing traffic to block unauthorized access, named after a safety wall built to stop fires.
What is a Firewall?
What is HTTP (Hyper-Text Protocol)?
Unlike IPv4, which uses 32-bit addresses, this newer version uses 128-bit hexadecimal addresses to prevent running out of IPs.
What is IPv6?
This command line utility shows you every single "hop" or router a packet passes through on its way to a destination.
What is traceroute (or tracert)??
This popular open-source tool, whose logo is a shark fin, lets you capture and analyze individual network data packets.
What is Wireshark?
If your computer can't load google.com by name but can open 8.8.8.8, this server protocol is likely failing.
What is DNS (Domain Naming System)
This process allows a router to modify public and private IP headers so multiple local devices can share a single public IP address.
What is NAT (Network Address Translation)?
This protocol translates an IP address into a physical MAC address on a local network.
What is ARP (Address Resolution Protocol)?
What does the Cat in CATNET symbolize in addition to just being a cat?
What is Cat5, Cat6, categories for ethernet cables?