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Compare 3 products

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Asus RT-AC51U Router
Asus RT-AC51U
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Asus RT-N66U Router
Asus RT-N66U
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Sierra Wireless AirLink ES450 Router
Sierra Wireless AirLink ES450
Editiorial reviews
3
3 editorial reviews
The Asus RT-AX68U is the WiFi 6 replacement for the RT-AC68U, which was of the most popular routers from Asus and it seems that the new device can be placedRead more
Stylish but affordable gaming performance.Read more
Whether you want a budget router, or a full-on gaming beastRead more
Read editorial reviews
18
3.9 out of 5
6 user ratings
5 stars
0 %
4 stars
83 %
3 stars
16 %
2 stars
0 %
1 stars
0 %
Read editorial reviews
User rating
54
4.0 out of 5
54 user ratings
5 stars
35 %
4 stars
35 %
3 stars
25 %
2 stars
3 %
1 stars
0 %
42
3.8 out of 5
42 user ratings
5 stars
16 %
4 stars
52 %
3 stars
28 %
2 stars
2 %
1 stars
0 %
6
3.2 out of 5
6 user ratings
5 stars
0 %
4 stars
50 %
3 stars
16 %
2 stars
33 %
1 stars
0 %

Dimensions

Width7.44 in8.15 in
N/A
Height1.42 in1.4 in
N/A
Depth5.08 in5.86 in
N/A
Weight0.6 lb0.99 lb0.88 lb
Number of units111
Rack-mount designnono
N/A

Communication

Frequency band
  • 2.4 GHz
  • 5 GHz
  • 2.4 GHz
  • 5 GHz
N/A
Management interfaceWeb/networkWeb/network
N/A
6to4yesyes
N/A
Communication protocol
  • IPv6
  • Multicast
  • Quality of Service
  • Wireless Multimedia Extensions
  • IPv6
  • Multicast
  • Quality of Service
  • Wireless Multimedia Extensions
N/A
Network / transport Protocol
  • PPTP
  • L2TP
  • IPSec
  • PPPoE
  • LPR/LPD
  • FTP
  • PPTP
  • L2TP
  • NTP
  • IPSec
  • PPPoE
  • LPR/LPD
  • FTP
  • DHCP
  • DDNS
N/A
Data link layer
  • Ethernet
  • Fast Ethernet
  • Gigabit Ethernet
  • IEEE 802.11a
  • IEEE 802.11ac
  • IEEE 802.11b
  • IEEE 802.11g
  • IEEE 802.11n
  • Ethernet
  • Fast Ethernet
  • Gigabit Ethernet
  • IEEE 802.11a
  • IEEE 802.11b
  • IEEE 802.11g
  • IEEE 802.11n
N/A
Wireless standards
  • IEEE 802.11a
  • IEEE 802.11ac
  • IEEE 802.11b
  • IEEE 802.11g
  • IEEE 802.1x
  • IEEE 802.11n
  • IEEE 802.11a
  • IEEE 802.11b
  • IEEE 802.11g
  • IEEE 802.3
  • IEEE 802.3ab
  • IEEE 802.3u
  • IEEE 802.3x
  • IEEE 802.11n
N/A
Mobile broadband supportyesyesyes
Type of mobile supportUSB modemUSB modem
N/A
Mobile 4G (LTE)yesyesyes
Mobile 3Gyesyes
N/A
Mobile 2G (GSM)noyes
N/A
Throughput WAN-LAN100.0 Mbps731.0 Mbps
N/A
VoIP (SIP)nono
N/A
Wireless networkyesyesyes
2.4GHz wireless networkyesyes
N/A
2.4GHz data transfer rate300.0 Mbps450.0 Mbps
N/A
5GHz wireless networkyesyes
N/A
5GHz data transfer rate450.0 Mbps450.0 Mbps
N/A
External antennayesyes
N/A
Detachable antennanoyes
N/A
MIMOyesyes
N/A
Number of antennas23
N/A
Total wireless data transfer rate733.0 Mbps900.0 Mbps
N/A
Wireless security
  • TKIP
  • WEP
  • WPA-Enterprise
  • WPA-PSK
  • WPA
  • WPA2-Enterprise
  • WPA2-PSK
  • WPA2
  • WPS
  • TKIP
  • WEP
  • WPA-PSK
  • WPA
  • WPA2-PSK
  • WPA2
  • WPS
N/A
Number of simultaneous connections
N/A
34925
N/A
Jumbo frames support
N/A
yes
N/A
Mobile HSUPA
N/A
yes
N/A
Mobile HSDPA (turbo-3G)
N/A
yes
N/A
Beamforming
N/A
yes
N/A
MU-MIMO
N/A
no
N/A

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Asus RT-N66U Router
Asus RT-AC66U
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