ASUS RT-AC51U Fast Ethernet Black wireless router

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Identifiers
Model ASUS RT-AC51U
MPN ASUS RT-AC51U
Dimensions / Weight
Key Features
AC adapter included
Indicates whether the product comes with an AC power adapter included in the package. A value of "Yes" means a charger is supplied, while "No" indicates that no charger is provided and the user must obtain one separately.
Yes
AC input frequency
The frequency of the alternating current supplied to the device, expressed in hertz (Hz). It indicates the acceptable operating range for the electrical mains that powers the product.
50 - 60 Hz
AC input voltage
The alternating current voltage range that the product accepts from its power source, expressed in volts (V). It indicates the minimum and maximum supply voltages compatible with the device.
110 - 240 V
Antenna
The total count of antenna units present on the device, regardless of type or orientation. This value indicates how many separate antennas are installed and can help assess potential signal coverage and performance.
5 dBi antenna x 2
Antenna type
The classification of an antenna used in a device, indicating its physical configuration or mounting style such as external, internal, integrated, directional, omnidirectional, or multi‑antenna setups (e.g., "2x2", "4 x External"). It helps buyers understand how the antenna is attached and what signal coverage it may provide.
Internal & external
Antennas quantity
The total count of antenna units present on a device or system. It indicates how many separate antennas are installed and can help assess potential signal coverage and performance.
3
Bands
A comma‑separated list of the radio frequency bands that a device can receive or transmit, such as 2.4 GHz, 5 GHz, LTE Band 3, or 5G NR n78. The values are free text and may include band names, numeric frequencies, or both.
Dual Band
Cables included
A list of the cable types that are supplied with the product, such as USB, HDMI, VGA, DisplayPort, LAN (RJ‑45), SATA, audio or other relevant connectors.
LAN (RJ-45)
Cabling technology
The type of cable or connector technology used by the product, such as Ethernet standards (e.g., 10/100Base‑T, 1000BASE‑T, 10GBase‑T) or other networking cable types. It indicates the physical medium and protocol supported for data transmission.
10/100Base-T(X)
Colour
The colour or combination of colours that a product is available in, expressed as common names such as "Black", "Silver" or comma‑separated lists like "Black, White". It indicates the visual appearance of the item for consumers.
Black
DC-in jack Yes
Depth
The linear measurement of an object from front to back or top to bottom, expressed in a physical unit such as millimeters, centimeters, inches, etc. It indicates how deep the item is and can be used for fitting, compatibility, or spatial planning.
129 mm
Detachable antenna(s) Yes
Device type
The general classification of a product, such as tablet, smartphone, router, or computer. It indicates the primary function or form factor that helps buyers quickly identify and compare similar items.
N/A
DHCP Client
Indicates whether a device supports the DHCP client function, meaning it can automatically request an IP address and related network settings from a DHCP server.
Yes
DHCP client
Indicates whether the device supports the DHCP client function, meaning it can automatically request an IP address and related network settings from a DHCP server.
Yes
DHCP server
Indicates whether the device supports acting as a DHCP server, allowing it to assign IP addresses and network configuration settings to clients on the network.
Yes
Ethernet LAN
Indicates whether the product includes an Ethernet LAN interface for wired network connectivity, allowing data transmission over RJ‑45 or compatible cables.
Yes
Ethernet LAN interface type
Indica el tipo o estándar de la conexión Ethernet que posee un producto, como Gigabit Ethernet, 10 GbE, 2.5 GbE, Fast Ethernet, etc. Los valores suelen ser textos descriptivos sin unidades numéricas y pueden incluir varias opciones separadas por comas cuando el dispositivo soporta más de una velocidad.
Fast Ethernet
Ethernet LAN ports
Represents the total count of Ethernet LAN (RJ‑45) interfaces available on a product. The value is an integer indicating how many physical Ethernet ports are present, regardless of speed or generation.
5
Ethernet WAN
Indicates whether the device has an Ethernet port on its WAN side, allowing connection to a wired network for internet access or other external networks.
Yes
Firewall
Indicates whether the device includes an integrated firewall that filters and protects network traffic.
No
Frequency
The operating frequency of a device or component, expressed in hertz (Hz). It represents the number of cycles per second that the product’s internal circuits or wireless radios can run and is useful for comparing performance across similar products.
2.4 GHz 5 GHz
Height
The vertical dimension of a product measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and applies to any item where height is relevant, including books, electronics, furniture and other objects.
36 mm
Internal modem
Indicates whether the product includes a modem that is installed inside the device, such as an integrated cellular or Wi‑Fi module. A value of "Yes" means the modem is built into the chassis; "No" indicates it requires an external accessory.
Yes
LED indicators
A list of the functions or statuses that an LED indicator on a device can display, such as power status, activity, link, and other operational signals.
Yes
Manual
Indicates whether a user manual—physical or digital—is provided with the product. A value of "Yes" means that a manual is included, while a value of "No" indicates that no manual is supplied.
Yes
Maximum WLAN data transfer rate
The highest theoretical speed at which a device can send or receive data over a wireless network, expressed in megabits per second (Mbps). It represents the peak throughput under optimal conditions and is useful for comparing performance across routers, access points, and other Wi‑Fi equipment.
433 Mbit/s
Networking standards
A list of the networking protocols and standards that a device can support or comply with, such as IEEE 802.11 variants for wireless, IEEE 802.3 for Ethernet, or other relevant networking specifications. The values are typically separated by commas and may include both technical identifiers and consumer‑friendly labels.
IEEE 802.11a,IEEE 802.11ac,IEEE 802.11b,IEEE 802.11g,IEEE 802.11n
On/off switch
Indicates whether the product includes an on/off switch that allows the user to power it on or off manually.
Yes
Other Connectors 1 x USB 2.0
Power source type
The type of electrical supply that powers the device, such as mains electricity, batteries, USB power, or a combination of these options.
AC
Quality of Service support
Indicates whether a product supports Quality of Service (QoS) features, which allow prioritization and management of network traffic to ensure optimal performance for critical applications.
Yes
Quick start guide
Indicates whether a quick‑start guide is provided with the product. A value of "Yes" means that a brief, introductory manual or overview is included to help users get started quickly; "No" indicates that no such guide is supplied.
Yes
Reset button
Indicates whether the device has a physical reset button that restores factory settings or original configuration when pressed.
Yes
Security algorithms
Una lista de los algoritmos criptográficos y protocolos de seguridad que el producto soporta, como cifrado (AES, WEP), autenticación (WPA2-PSK, EAP-TLS) o protocolos de red (HTTPS, SSH). Cada elemento describe un algoritmo individual; la lista puede contener varios valores separados por comas.
128-bit WEP,64-bit WEP,WPA,WPA-PSK,WPA2,WPA2-PSK,WPS
Security Protocols
A list of network security protocols that a device supports, such as WEP, WPA‑PSK, WPA2‑PSK, WPA‑Enterprise, WPA3, IPsec, SSL/TLS, 802.1x, and other authentication or encryption methods. The value is typically a comma‑separated string of protocol names.
802.1x WEP (128 bit) WEP (64 bit) WPA-Enterprise WPA-PSK WPA2-Enterprise WPA2-PSK WPS
Supported network protocols
A list of network communication protocols that a device can use or support, such as TCP/IP, HTTP, HTTPS, FTP, DHCP, DNS, and various wireless standards. Each protocol is represented by its standard name and may be separated by commas or slashes in the source data.
IPv4, IPv6
Top Wi-Fi standard
A list of the wireless networking protocols and frequency bands that a device can connect to, such as IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, Wi‑Fi 4 (802.11n), Wi‑Fi 5 (802.11ac) or Wi‑Fi 6 (802.11ax). The values are typically separated by commas and may include both the technical name and a consumer‑friendly label.
Wi-Fi 5 (802.11ac)
Total LAN Connections
The count of physical Ethernet (LAN) ports available on a networking device, such as routers, switches, or access points. This value indicates how many wired network interfaces the product can provide for connecting computers, servers, or other devices.
4
Total WAN Connections
The total count of independent Wide Area Network (WAN) interfaces that a networking device can support simultaneously. This value indicates how many separate internet or external network connections the device is capable of handling at once, regardless of their type (e.g., Ethernet, DSL, cable). It helps users understand the device’s capacity for load balancing, fail‑over, or multi‑service connectivity.
1
USB version
The specific version of the USB standard that a product supports, expressed as a generation number and optional descriptive suffix (e.g., "3.2 Gen 1" or simply "3.0"). This attribute indicates the data‑transfer capabilities and compatibility with USB devices.
2.0
VPN Support
A list of the VPN protocols that a device can establish, such as PPTP, L2TP, IPSec, OpenVPN, and related pass‑through or server modes. The values are typically separated by commas and may include variations like "IPSec Pass‑Through" or "OpenVPN Server" to indicate specific capabilities.
IPSec Pass-ThroughL2TP Pass-ThroughPPTP serverOpenVPN serverOpenVPN client
Weight
The mass of the product expressed in a standard unit such as grams or kilograms. It represents how heavy the item is and can be used for shipping calculations, handling instructions, or consumer information.
270 g
Wi-Fi standards
A list of the wireless networking protocols and frequency bands that a device can connect to, such as 802.11a, 802.11b, 802.11g, Wi‑Fi 4 (802.11n), Wi‑Fi 5 (802.11ac) or Wi‑Fi 6 (802.11ax). The values are typically separated by commas and may include both the technical name and a consumer‑friendly label.
802.11a,Wi-Fi 5 (802.11ac),802.11b,802.11g,Wi-Fi 4 (802.11n)
Width
The horizontal measurement of a product, expressed in a linear unit such as millimetres or inches. It indicates how wide the item is from one side to the other and is used for sizing, fitting, and compatibility purposes.
189 mm
Wireless Protocols
A textual list of the wireless protocols and standards that a device supports, such as IEEE 802.11a/b/g/n/ac/ax, PoE (IEEE 802.3af/at), LTE bands, or other radio‑frequency technologies. The value may contain multiple entries separated by spaces or commas.
IEEE 802.11a IEEE 802.11ac IEEE 802.11b IEEE 802.11g IEEE 802.11n IPv4 IPv6
Wireless Speed
The maximum data transfer rate that a device can achieve over its wireless interface, expressed in bits per second or common abbreviations such as Mbps or Gbps. This value indicates how quickly the device can send and receive information wirelessly.
733 (300+433) Mbps
WLAN data transfer rates supported
The highest theoretical speed at which a device can send or receive data over its wireless network interface, expressed in megabits per second (Mbps), kilobits per second (Kbps) or gigabits per second (Gbps). It represents the peak throughput achievable under optimal conditions and allows users to compare the performance of different Wi‑Fi devices.
1,2,5.5,6,9,12,18,24,36,48,54,300,433 Mbit/s
ASUS

Asus is a Taiwanese electronics company that produces a wide range of products, including laptops, desktops, mobile phones, tablets, and servers. Asus is best known for its laptops, which are often praised for their quality, features, and design.