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resolver
A server that implements the DNS protocol and can resolve queries. A resolver usually serves a set of clients (e.g. all hosts in campus or all clients of a given ISP). It sends DNS queries to nameservers everywhere on behalf of its clients and stores the received answers in its cache. A resolver must know the IP addresses of the root nameservers.
RIP
Routing Information Protocol. An intradomain routing protocol based on distance vectors that is sometimes used in enterprise networks. RIP is defined in :rfc:`2453`.
RIR
Regional Internet Registry. An organization that manages IP addresses and AS numbers on behalf of :term:`IANA`.
root nameserver
A name server that is responsible for the root of the domain names hierarchy. There are currently a dozen root nameservers and each DNS resolver See http://www.root-servers.org/ for more information about the operation of these root servers.
round-trip-time
The round-trip-time (RTT) is the delay between the transmission of a segment and the reception of the corresponding acknowledgment in a transport protocol.
router
A relay operating in the network layer.
RPC
Several types of remote procedure calls have been defined. The RPC mechanism defined in :rfc:`5531` is used by applications such as NFS
SDU (Service Data Unit)
a Service Data Unit is the unit information transferred between applications
segment
a segment is the unit of information transfer in the transport layer
SMTP
The Simple Mail Transfer Protocol is defined in :rfc:`821`
SNMP
The Simple Network Management Protocol is a management protocol defined for TCP/IP networks.
socket
A low-level API originally defined on Berkeley Unix to allow programmers to develop clients and servers.
spoofed packet
A packet is said to be spoofed when the sender of the packet has used as source address a different address than its own.
ssh
The Secure Shell (SSH) Transport Layer Protocol is defined in :rfc:`4253`
standard query
For DNS servers and resolvers, a standard query is a query for a `A` or a `AAAA` record. Such a query typically returns an IP address.
switch

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Glossary

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read-only
Source string location
../../glossary.rst:65
String age
5 years ago
Source string age
5 years ago
Translation file
locale/pot/glossary.pot, string 155