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Comparison of QNAP TS-251A and ZyXEL NAS326

The side-by-side comparison of the devices’ specifications. The comparison table below makes it easier to choose the most fitting NAS.

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Adding/changing a NAS
QNAP TS-251A (TS-251A)
QNAP TS-251A (TS-251A)
ZyXEL NAS326 (NAS326)
ZyXEL NAS326 (NAS326)
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Launch 2016 2016
Class Small office / Home office Small office / Home office
Body
Dimensions 169 x 102 x 219 mm 207 x 164 x 123 mm
Weight 1.28 kg 1.26 kg
Disks
Disk bays 2 x 3.5" SATA III 2 x 3.5" SATA II
RAID JBOD
RAID0
RAID1
JBOD
RAID0
RAID1
SSD support yes no
Network
LAN ports 2 x Gigabit Ethernet 1 x Gigabit Ethernet
Wireless yes, with USB dongle no
Protocols AFP
CIFS/SMB
FTP
ISCSI
NFS
SFTP
WEBDAV
AFP
CIFS/SMB
FTP
HTTP
ISCSI
NFS
WEBDAV
P2P support BitTorrent BitTorrent
Media server DLNA
UPnP
iTunes
DLNA
UPnP
iTunes
Cloud backup Amazon S3
Box
Dropbox
Google Drive
Microsoft OneDrive
Dropbox
Google Drive
Connectivity
USB ports 3 x USB 3.0 1 x USB 2.0
2 x USB 3.0
eSATA ports no no
System
CPU Intel Celeron N3060 dual-core @ 1.6 GHz Marvell Armada 380 88F6810 @ 1.3 GHz
RAM 2 GB (upgradable) 512 MB
Flash 4 GB 256 MB
Operating system QNAP QTS ZyXEL
Alternative OS    
Power
Power supply 12 V / 5.4 A 12 V / 5 A
Consuption 16.2 W / 7.9 W 28 W / 5.5 W
Fans 1 x 70 mm 1 x 80 mm
Noise level 18.3 dB(A)  
Features
Specials Failover and link aggregation
HDMI output
Infrared receiver
Audio input
Audio output
 
Administration
Default IP DHCP DHCP
Default username admin admin
Default password admin 1234

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