SMTP uses which of the following TCP port?

• A. 22
• B. 23
• C. 21
• D. 25

Which of the following protocol is not used to receive mail messages?

• A. SMTP
• B. Post office protocol (pop)
• C. Internet message access protocol (imap)
• D. FTP

What is on-demand mail relay (ODMR)?

• A. Protocol for smtp security
• B. An smtp extension
• C. Protocol for web pages
• D. Protocol for faster mail transfer

An email client needs to know the _________ of its initial SMTP server.

• A. Ip address
• B. Mac address
• C. Url
• D. Name

An SMTP session may not include _______

• A. Zero smtp transaction
• B. One smtp transaction
• C. More than one smtp transaction
• D. One HTTP transaction

SMTP defines _______

• A. Message transport
• B. Message encryption
• C. Message content
• D. Message password

Which one of the following is an SMTP server configured in such a way that anyone on the internet can send e-mail through it?

• A. Open mail relay
• B. Wide mail reception
• C. Open mail reception
• D. Short mail reception

SMTP is not used to deliver messages to ______

• A. User’s terminal
• B. User’s mailbox
• C. User’s word processor
• D. User’s email client

Which is the most optimal scheduling algorithm?

• A. Fcfs €? first come first served
• B. Sjf €? shortest job first
• C. Rr €? round robin
• D. None of the mentioned

The real difficulty with SJF in short term scheduling is ____________

• A. It is too good an algorithm
• B. Knowing the length of the next cpu request
• C. It is too complex to understand
• D. None of the mentioned