Hosting glossary

Plain-English definitions for the terms you'll meet when you buy, move or run a website. Click a term to see what it means and why it matters on a real hosting account.

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A3 terms
Above the fold Add-on domain Apache
B3 terms
Backup retention Bad neighbour effect Bandwidth
C6 terms
Cache CDN CMS cPanel CPU cores Cron job
D4 terms
Data centre Dedicated IP DNS Downtime
E3 terms
Email deliverability Entry processes Error log
F2 terms
Firewall FTP
G2 terms
Green hosting GZIP
H3 terms
Hotlink protection htaccess HTTPS
I2 terms
Imunify360 Inode
J1 term
JetBackup
K1 term
Keep-alive
L2 terms
LiteSpeed Load balancing
M5 terms
Malware Managed hosting Memcached Migration MySQL
N2 terms
Nameservers NVMe
O1 term
Object cache
P3 terms
Parked domain PHP PHP workers
R4 terms
Redirect Redis Reseller hosting Resource usage
S10 terms
Server response time Shared hosting SLA Softaculous Spam filter SSD SSH SSL certificate Staging site Subdomain
T2 terms
TTFB Two-factor authentication
U1 term
Uptime
V1 term
VPS
W4 terms
WAF Webmail WHM WordPress
Z1 term
Zero downtime migration

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