OSI Model
This layer is responsible for routing packets across different networks using logical addressing like IP.
What is the Network Layer 3 (Layer 3)?
This IP address, 127.0.0.1, is used by a host to test its own network stack.
What is the Loopback address?
This 802.11 standard operates in both the 2.4 GHz and 5 GHz bands and introduced MIMO.
What is 802.11n (Wi-Fi 4)?
This command-line tool is used to test basic connectivity between two hosts.
What is ping?
In this physical topology, all devices are connected to a central hub or switch.
What is a Star topology?
Unlike TCP, this transport layer protocol is connectionless and does not guarantee delivery.
What is UDP?
This is the total number of bits in a single IPv6 address.
What is 128 bits?
This is the name given to the unique ID or "name" of a wireless network.
What is the SSID?
This tool is used to find the distance to a break in a fiber optic cable.
What is an OTDR?
This value, usually 1500 bytes, defines the largest packet or frame size that can be sent over a network.
What is the MTU?
What is the physical Layer (Layer 1)
This is the decimal value of an 8-bit octet where all bits are set to 1.
What is 255?
This technology allows a wireless access point to use multiple antennas to transmit and receive data simultaneously.
What is MIMO
This hardware tool is used to "trace" a cable from a wall jack back to a messy patch panel by using a tone generator.
What is a Tone Generator and Probe?
This document describes the "standard operating procedures" and expected uptime of a service between a provider and a customer.
What is an SLA?
This protocol uses port 22 to provide a secure, encrypted terminal connection to a remote device.
What is SSH?
This type of transmission sends a packet from one host to a specific group of interested hosts.
This latest WPA standard introduced individualized data encryption and the DragonFly Key Exchange.
What is WPA3?
What is netstat?
This protocol is used by network devices to send error messages and operational information, such as "Destination Unreachable".
What is ICMP?
This PDU is associated with Layer 4 (Transport) when using the TCP protocol.
What is a Segment?
This is the private IP address range for Class B networks according to RFC 1918.
What is 172.16.0.0 to 172.31.255.255?
This wireless frequency band offers 11 channels in the US (3 non-overlapping) but suffers from high interference.
What is the 2.4 GHz band?
This is a small hardware plug used to trick a NIC into thinking it has a physical link for diagnostic purposes.
What is a Loopback Plug?
This port mirroring feature on a switch allows you to copy all traffic from one port to another for analysis.
What is SPAN?