The command that can be used to display any email messages awaiting delivery alongside the reason that they were not delivered is known as Mailq. 
<h3>What is Email?</h3>
Email stands for Electronic mail. It may be defined as a type of method that significantly involves the exchange of computer-stored messages from one user to one or more recipients via the internet.
The command "Mailq" stands for mail queue. It is the command in Linux that prints the queued mail gain in form of sending it to the user. This command prints a list of messages that are in the mail queue. It is the same as the Sendmail-bp command. 
Therefore, "mailq" is the command that can be used to display any email messages awaiting delivery alongside the reason that they were not delivered. 
To learn more about Email, refer to the link:brainly.com/question/24688558
#SPJ1
 
        
             
        
        
        
Answer:
Latency of an object O is shown below.
Explanation:
W segment and stalled state transmits nothing and waits for acknowledgement. The latency is 2 R TT + the time required for server that are using to transmit the object + the amount of time when server is in stalled state. Let K be the number of window that is K= O/WS .The serveries stalled state where K-1 is period of ime with period lasting RTT-(W-1)S/R 
latency = 2RTT +O/R +(K-1)[S/R +RTT - WS/R]
After combining the two case 
latency = 2 RTT + O/R + (K-1)[S/R +RTT - WS/R]
where [x] means maximum of (x.0). This is the complete ananlysis of the static windows.
server time for transmit the object is (K-1)[S/R +RTT - WS/R]