Deck 24: Electronic Mail, dns, and Http

Question 1

The _________ is responsible for transferring the message from the MHS to the MS.

A)MDA
B)ADMD
C)MTA
D)MUA

Answer 1

A

Question 2

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

Answer 2

False

Question 3

Typically,the ________ function is housed in the user's computer and is referred to as a client e-mail program or a local network e-mail server.

A)MDA
B)MHS
C)MUA
D)MTA

Answer 3

C

Question 4

The header section is not always present in a DNS message.

Question 5

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.

Question 6

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

A)MHS
B)MUA
C)ADMD
D)DNS

Question 7

POP3 is more complex than IMAP.

Question 8

IMAP always keeps messages on the server and replicates copies to the clients.

Question 9

An MUA can employ a long-term message store.

Question 10

Domains are organized hierarchically.

Question 11

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.

Question 12

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

Question 13

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

A)message store
B)administrative management
C)user agent
D)submission agent

Question 14

The IP address provides a way of uniquely identifying devices attached to the Internet.

Question 15

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

Question 16

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

Question 17

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

Question 18

Some e-mail systems only serve users on a single computer; others provide service across a network of computers.

Question 19

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

Question 20

The ________ relays mail for one application-level hop.

A)MTA
B)MS
C)POP
D)MSA

Question 21

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

A)Resolvers
B)DNS databases
C)Domain name spaces
D)MIME

Question 22

_______ is a section in a DNS message.

A)Header
B)Question
C)Authority
D)All of the above

Question 23

_______ are server programs that hold information about a portion of the domain name tree structure and the associated RRs.

A)MIME
B)Name servers
C)DNS databases
D)Domain name space

Question 24

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

A)cache
B)gateway
C)proxy
D)tunnel

Question 25

The ________ is like a packet switch or IP router in that its job is to make routing assessments and to move the message closer to the recipients.

Question 26

HTTP is ___________ .

A)a transaction-oriented client/server protocol
B)a stateless protocol
C)flexible in the formats it can handle
D)all of the above

Question 27

________ is an Internet standard defined in RFC 1939 that supports the basic functions of download and delete for e-mail retrieval.

A)POP3
B)IMAP4
C)ADMD
D)All of the above

Question 28

The ________ works on behalf of user actors and user applications and is their representative within the e-mail service.

Question 29

The Internet mail architecture is currently defined in RFC _______ .

Question 30

The _______ accepts the message submitted by an MUA and enforces the policies of the hosting domain and the requirements of Internet standards.

Question 31

________ supplements SMTP and allows the encapsulation of multimedia (nontext)messages inside of a standard SMTP message.

A)ADMD
B)MIME
C)DNS
D)IMAP

Question 32

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

A)SMTP
B)MIME
C)IMAP
D)POP3

Question 33

The _______ domain is dedicated exclusively for private businesses.

A)org
B)net
C)com
D)biz

Question 34

A ________ is a server that appears to the client as if it were an origin server.

A)tunnel
B)proxy
C)gateway
D)all of the above

Question 35

_______ is an extension to the RFC 822 framework that is intended to address some of the problems and limitations of the use of SMTP and RFC 822 for electronic mail.

Question 36

The ________ accepts each arriving message and either places it in the appropriate user mailbox or copies it to the local outgoing mail queue if forwarding is required.

Question 37

__________ is a facility that allows users at workstations and terminals to compose and exchange messages.

Question 38

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.

Question 39

Defined in RFC 821,______ is the standard protocol for transferring mail between hosts in the TCP/IP suite.

Question 40

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.

Question 41

A _______ is a forwarding agent,receiving a request for a URL object, modifying the request,and forwarding the request toward the server identified in the URL.

Question 42

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

Question 43

DNS is based on a hierarchical database containing _________ that include the name,IP address,and other information about hosts.

Question 44

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.

Question 45

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