ccTLD is an abbreviation for Country Code Top Level Domain.
ccTLDs are associated with a country - and are post-fixed with the standard ISO country code for that country.
Example:
.dk in www.example.dk refers to Denmark.
.de in www.example.de refers to Germany
.com in www.example.com does not contain a ccTLD (.com is a gTLD)
See also
gTLD
TLD
ISO country code
Read more
Information About Existing ccTLDs (at IANA)
CNAME is short for canonical name. As its name hints at, domains with this setting will refer to canon settings from another domain name. In other words, using C-Name on a domain means cloning another domain's settings.
Example:
www.example.com is an A-Record to 192.0.34.72
If you want web.example.com to always act like www.example.com, simply set up
Web.example.com CNAME www.example.com
Changing the A-Record on www.example.com to another IP address will immediately effect web.example.com - without you having to change any settings on web.example.com
DNS-altering functionality.
Updates may take up to 72 hours to reach the entire internet.
CNAMEs are managed in Add/Change Net services (see guide)
In Speednames domain management context, a C-Name is considered a net service.
See also
A-record
Web forward
Web alias
Net Service
Glossary of Terms