HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual page 735

CEPT Conference of European Postal and Telecommunications. A standardizing
body. For more information about CEPT, see the CEPT website at http://
www.cept.org.
CEPT Hierarchy The signal hierarchy used with E-carrier lines. See also E1-carrier line and E-3
carrier line.
Table 2-1.
Physical
carrier
—
E1
E2
E3
E4
E5
Certificate See Digital Certificate.
Channelized A circuit that is created by multiplexing and demultiplexing voice and/or data
using analog or digital techniques.
CHAP Challenge Handshake Authentication Protocol. An authentication protocol
that is supported by PPP. With CHAP, the authenticator challenges the peer.
The peer creates a hash value from its pre-shared password and a string of
text. The authenticator also creates a hash value. The authenticator compares
the hash values. If they match, authentication succeeds, and the link is
established. For more information about CHAP, see RFC 2759 (at http://
www.ietf.org/rfc/rfc2759.txt). See also PAP and PPP.
CIDR Classless Inter-Domain Routing. An IP addressing scheme that replaces the
older system based on A, B, and C classful addresses. With CIDR, a single IP
address can be used to designate many unique IP addresses. A CIDR IP address
resembles a normal IP address except that it ends with a slash followed by a
number called the IP network prefix, which specifies how many addresses are
included in the CIDR address. Lower numbers include more addresses. An IP
network prefix of /12, for example, can be used to specify 1,048,576 former
Class C addresses. CIDR addresses reduce the size of routing tables and make
more IP addresses available within organizations. For more information about
CIDR, see RFC 1519 (at http://www.ietf.org/rfc/rfc1519.txt).
CEPT signal hierarchy
DSD EO multiple
E0 1
E1 32
E2 128
E3 512
E4 2048
E5 8192
Appendix B: Glossary
E1 multiple Transmission rate
— 64 Kbps
— 2.048 Mbps
4 8.448 Mbps
16 34.368 Mbps
64 139.264 Mbps
256 565.148 Mbps
B-9