Exam 24: Electronic Mail, dns, and Http

The author MUA processes receive mail for storage and/or display to the recipient user.

A(n)________ domain is an Internet e-mail provider.

Messages must be formatted by the MUA on behalf of the message author so that the message can be displayed to the message recipient by the destination MUA.

When there are multiple root servers with the same name,each has an identical copy of the database for that server and the same IP address.

The ________ is the foundation protocol of the World Wide Web and can be used in any client/server application involving hypertext.

A _________ is a facility that may store previous requests and responses for handling new requests.

DNS allows essentially unlimited levels and uses the comma as the level delimiter in printed names.

SMTP is limited to the conversation that takes place between the SMTP sender and the SMTP receiver.

The protocol that is used for transfer of mail from a user agent to a MTA and from one MTA to another is the _________ .

________ are programs that extract information from name servers in response to client requests.

Examples of an _________ include a department that operates a local mail relay,an IT department that operates an enterprise mail relay,and an ISP that operates a public shared e-mail service.

HTTP is ___________ .

The ________ takes messages from the outgoing mail queue and transmits them to the proper destination host via SMTP transactions over one or more TCP connections to port 25 on the target hosts.

Interoperability is required among the MTA components along the transfer path through the MHS.

RFC 824 is the format for use in constructing messages for transmission via SMTP.

Each name server is configured with a subset of the domain name space,known as a ________ ,which is a collection of one or more subdomains within a domain,along with the associated RRs.

_______ is a section in a DNS message.

Four elements comprise the DNS: domain name space,DNS database,name servers,and _________ .

The _______ is a directory lookup service that provides a mapping between the name of a host on the Internet and its numerical address.

SMTP standardizes the message character set as 7-bit ASCII.