Smtp — Test 1

Correct Answer: A. A. Tcp
Explanation: Since TCP is a reliable protocol, it’s more efficient to use TCP protocol for e-mail transfer. TCP also provides more security than other transport layer protocols.

Correct Answer: A. A. SMTPs
Explanation: SSMTP is a simple mail transfer program to send mail from a local PC to a mail host. SNMP is a network management protocol. STARTTLS connections are secured by TLS.

Correct Answer: D. D. 25
Explanation: Port 21 is used for FTP control connection, port 22 is used by SSH, and port 23 is used by TELNET.

Correct Answer: D. D. FTP
Explanation: FTP is used to share files. SMTP, POP and IMAP are the protocols used to send and receive mails on the internet.

Correct Answer: B. B. An smtp extension
Explanation: ODMR is an extension to SMTP, in which mails are relayed to the receivers after they are authenticated. It allows only the authorized receivers to receive the mail.

Correct Answer: A. A. Ip address
Explanation: The client needs to know the IP of its initial SMTP server as it has to send the mail first to that server and then the server forwards the mail ahead on behalf of the user.

Correct Answer: D. D. One HTTP transaction
Explanation: An SMTP session can only include SMTP transactions regardless the number. Any other protocol’s transaction is not included in an SMTP session.

Correct Answer: A. A. Message transport
Explanation: As the name suggests, Simple Mail Transfer Protocol is only responsible for “how” the message is transferred i.e. Transport of the message. Other protocols such as TCP are used to provide other services like encryption for the messages.

Correct Answer: A. A. Open mail relay
Explanation: Anyone can send an e-mail through an Open Mail Relay server so it acted like a free relay for email agents to forward their mails through. Open Mail Relays are now unpopular because they can be used by attackers to perform man-in-the-middle attacks.

Correct Answer: C. C. User’s word processor
Explanation: SMTP can only be used to send messages to user’s terminal, email client or mailbox. A stand-alone word processor cannot be connected to a network, so it won’t be possible to deliver messages to it.