OSI Layer & Protocols
This layer is responsible for routing packets across different networks using logical addressing IP.
What is Network Layer (Layer 3)?
The standard 8-pin connector used for most twisted-pair Ethernet cables.
What is RJ-45?
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 2.4GHz 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?
This protocol operates on Port 443 and provides encrypted communication for web traffic.
What is HTTPS?
This type of interference occurs when electrical signals from one wire pair leak into an adjacent pair.
What is Crosstalk?
If a device cannot reach a DHCP server, it may self-assign an address in the 169.254.0.0/16 range, known as this.
What is APIPA?
This is the name given to the unique ID or "name" of a wireless network.
What is SSID?
This Windows command shows the path a packet takes to reach its destination, listing every router along the way.
What is tracert?
This protocol uses Port 143 to allow users to view and manipulate messages on a mail server without downloading them.
What is IMAP?
This specific phenomenon occurs when a signal loses strength at is travels over a long distance.
What is Attenuation?
In the IPv6 address 2001:0db8::ff00:0042:8329, the double colon represents this.
What are the consecutive blocks of zeros?
This is a wireless site survey performed without visiting the physical site, using blueprints and software instead.
What is a Predictive Analysis?
This hardware tool is used to "trace" a cable from a wall hack back to a messy patch panel by using a tone generator.
What is a Tone Generator and Probe
This PDU is associated with Layer 4 (Transport) when using the TCP protocol.
What is a Segment?
This hardware device is used to connect multiple network segments and can be "managed" or "unmanaged."
What is a Switch?
This is the decimal value of an 8-bit octet where all bits are set to 1
What is 255?
This feature allows a wireless client to stay connected while moving from one Access Point to another.
What is Roaming?
This command-line tool is used on Linux/macOS to query DNS records, replacing the older 'nslookup.'
What is dig?
This OSI Layer is responsible for electrical signals, cabling, and bit-level transmission.
What is Physical Layer (Layer 1)?
This fiber optic connector features a bayonet-style twist-on mechanism.
What is an ST (Straight Tip) connector?
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 latest WPA standard introduced individualized data encryption and the DragonFly Key Exchange.
What is WPA3?
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?