Review Questions

1. ‚	You have configured SMTP on your network to allow users to exchange messages with the Internet. Exchange recipients can send mail to Internet users, but Internet users cannot send mail to the Exchange recipients. You verify that your SMTP virtual server is accessible from the Internet. What is the most likely cause of the problem? Your firewall is not open to port 110 (POP3). Your firewall is not open to port 25 (SMTP). Your client computers are not configured with TCP/IP. Your client computers are not directly connected to the Internet. Your domain has no MX record in DNS.
2. ‚	Which of the following SMTP folders is not normally used by Exchange Server 2003? Pickup folder Queue folder Bad Mail folder DNS folder
3. ‚	How would you set the maximum size of messages allowed over an X.400 Connector? Using the General property page of the connector. Using the Limits property page of the connector. Using the Content Restrictions property page of the connector. You cannot set this limit on an X.400 Connector.
4. ‚	Your Exchange environment uses SMTP to exchange mail with a company named Sockets & Wrenches, which uses a host-based SMTP mail system. When users on your system send mail to the name of the host at Sockets & Wrenches, it is not delivered. But if those users use an IP address for addressing, the mail is delivered. You are informed that other systems can send mail to Sockets & Wrenches using a host name in the addressing. What should you do to enable your users to be able to send mail to Sockets & Wrenches using a host name in the addressing? (Select the best answer.) Configure a mapping on the DNS server on your network. Configure a HOSTS file on each client. Configure an LMHOSTS file on each client. Configure SMTP to forward all mail to Sockets & Wrenches.
5. ‚	As administrator of an Exchange organization, you have been asked to have all outgoing SMTP mail sent to a single SMTP server. How should you configure this? Enter the SMTP server as an MX record in the DNS. Enter the SMTP server as a CN record in the DNS. Enter the SMTP server in the SMTP virtual server properties. Enter the SMTP server in the SMTP Connector properties. Make the SMTP server the default gateway in the TCP/IP settings of your IMS computer.
6. ‚	SMTP relies on which of the following components to resolve addresses of Exchange recipients on inbound messages? DNS SMTP Resolver program Active Directory
7. ‚	Your DNS forward lookup zone contains the following MX record entries: mycompany.com MX 100 mail1.mycompany.com. mycompany.com MX 50 mail2.mycompany.com. mycompany.com MX 150 mail3.mycompany.com. On which server, by default, is a connection attempted to route SMTP messages? The server listed first. The server with the lowest preference value. The server with the highest preference value. The servers will be randomly connected to.
8. ‚	In the MX record mycompany.com MX 150 mail3.mycompany.com. what does the mycompany.com entry specify? The domain for which the MX record will handle inbound mail. The domain for which the MX record will handle outbound mail. The domain that is authorized to send mail to the organization in which the MX record is configured. The domain that is not authorized to send mail to the organization in which the MX record is configured.
9. ‚	You have recently completed the configuration of an X.400 connection between your Exchange Server 2003 organization and a foreign X.400 organization that is using a Unix-based messaging system. The administrator in the other organization reports to you that inbound messages from your organization are garbled. Messages inbound to your organization are not affected. What is the most likely problem? You have not selected the Allow BP-15 option. You have selected the Allow Exchange Contents option. You have selected the Two-Way Alternate option. You have not set the Global Domain Identifier.
10. ‚	You are attempting to configure a new TCP X.400 connector so that your Exchange Server 2003 organization can interact with a Unix-based X.400 messaging system. When you attempt to create the TCP X.400 connector in the desired routing group , you receive an error dialog. What is the most likely reason for this occurrence? You did not install the X.400 connector item during Exchange setup. You do not have a DNS server in your network. You did not first create a TCP X.400 transport stack service. The schema master could not be reached.
11. ‚	You are the Exchange administrator for your organization. You have five Exchange Server 2003 servers all located in one administrative group and one routing group. A recent virus outbreak on your network caused a large number of messages to be sent using fake and spoofed source addresses. Many of the messages were sent to incorrect e-mail addresses and thus could not be delivered. Where could you go to look for these messages? Pickup folder Queue folder Bad Mail folder DNS folder
12. ‚	In the basic SMTP process, what command does the client computer use after the server has confirmed the HELO command with the 250 reply code? EHLO HELO MAIL FROM REQ
13. ‚	You are the Exchange administrator for a company that has five geographically distant sites in North America. Although all sites have full T-1 connectivity between them, circuit reliability has been very poor over the past few months. In many cases, the links have dropped altogether, causing message transfer problems for your Exchange Server 2003 routing groups. What type of connector could you create between these routing groups that would work best in this situation? Routing group connector X.400 Connector Lotus Notes connector Active Directory connector
14. ‚	When sending SMTP data, what format must the data be in? 32-bit 16-bit 8-bit 7-bit
15. ‚	You have recently completed the configuration of the Lotus Notes connector, allowing your Exchange Server 2003 organization to coexist with your Lotus Notes organization. Users report no problems sending or receiving messages but complain that the schedule information for Notes users is not up-to-date. What is the most likely reason for this problem? The Active Directory connector is not configured completely. The Microsoft Exchange MTA stacks service has stopped . The Calendar connector is not configured for the Notes organization. The Recipient Update Service has not run recently.
16. ‚	After how many hours, by default, will a message that has not been delivered by the SMTP virtual server be returned to the sender with an NDR? 12 24 36 48
17. ‚	After how many hours, by default, will an undelivered message cause a delay notification to be sent to the sender of the message? 12 24 36 48
18. ‚	The administrator of an X.400 messaging system with which your Exchange organization is connected tells you that the speed of the connection could be enhanced if you were to turn on the Two-Way Alternate option. Where would you go to do this? The Connection property page of the MTA Transport Stack used by the X.400 Connector The Connection property page of the X.400 Connector The Override property page of the X.400 Connector The Advanced property page of the X.400 Connector
19. ‚	In the basic SMTP process, what command does the client computer use to identify itself to the SMTP server? EHLO HELO MAIL FROM REQ
20. ‚	You would like to require SMTP hosts and clients to authenticate themselves before allowing messages to be transferred using your Exchange server. What forms of user authentication does the SMTP virtual server support? (Choose all that apply.) Anonymous Basic Digest Secure Sockets Layer Integrated Windows

Answers

1. ‚	E. Transferring messages between SMTP hosts is dependent on the Domain Name Service (DNS). When an SMTP host sends an e-mail message to another SMTP host, DNS must resolve the domain name of the receiving host to an IP address. DNS does this by storing special records named Mail Exchanger (MX) records in the DNS database. Each MX record in a DNS database represents an SMTP host to which mail can be forwarded.
2. ‚	A. SMTP creates three file system folders to manage messages on an Exchange 2000 Server: Pickup, Queue, and Bad Mail. However, the Pickup folder is not used. By default, all of these folders are created in the C:\Program Files\Exchsrvr\Mailroot\vsi x folder.
3. ‚	C. As with most connectors, the X.400 Connector allows you to set limits on message sizes. You do this using the Content Restrictions property page of the connector.
4. ‚	A. Since your users cannot connect to the remote host by name but can connect by IP address, it is apparent that there is a problem resolving the server name through DNS. Since other hosts can resolve the name, it is also apparent that the problem is local.
5. ‚	C. You would need to configure the name of the SMTP server on the Message property page of the SMTP virtual server. This page lets you name a smart host to which messages are forwarded when they cannot be resolved within your domain. This offers the powerful ability to configure a single host to which all external mail should go (such as to the Internet).
6. ‚	D. All information about users, including their addresses, is stored in the Active Directory.
7. ‚	B. The MX record that has the lowest preference value will be the first server that a connection attempt is made to, which is the record. mycompany.com MX 50 mail2.mycompany.com
8. ‚	A. The first field in this MX record specifies the domain namespace to which the MX record will apply. Thus, all mail sent to the mycompany.com namespace will use this (and possibly other similarly configured) MX record(s).
9. ‚	B. The most likely cause for this problem is that you have selected the Allow Exchange Contents option, which enables features that are likely not compatible with the foreign X.400 messaging system, such as Rich Text formatting.
10. ‚	C. You cannot create the TCP X.400 connector until you have created the TCP X.400 transport stack service.
11. ‚	C. The Bad Mail folder is where undeliverable messages that cannot be returned to the sender are stored.
12. ‚	C. After the server returns the HELO command with the 250 status code, the client next sends the MAIL FROM command with the identification of the sender. The server then replies to this with another 250 status code.
13. ‚	B. The X.400 system of data transfer is designed for low-reliability, low-bandwidth connections. By using the X.400 Connector between your routing groups, you can increase message transfer reliability.
14. ‚	D. SMTP data is sent in 7-bit format. If the outgoing data is in 8-bit format, it will be converted to 7-bit using either the MIME extensions or UUENCODE.
15. ‚	C. The Lotus Notes connector synchronizes only mailboxes between the organizations, not calendaring information. You must properly configure the Calendar connector to run along with the Notes connector in order to synchronize calendar information.
16. ‚	D. If the message cannot be delivered in two days (48 hours), it will be returned to the sender with an NDR explaining such.
17. ‚	A. If the message has not been delivered after 12 hours, the sender of the message will receive a delay status notification informing them that the message has not yet been sent, but attempts to send the message are continuing.
18. ‚	D. The Two-Way Alternate specification is an X.400 standard in which two connected X.400 systems take turns transmitting and receiving information. If the foreign system to which you are connecting supports this option, enabling it can greatly improve transmission speed.
19. ‚	B. The client computer identifies itself to the server by sending the HELO command with the computer ‚ s identity (for example, HELO server1.widgets.com ).
20. ‚	A, B, E. It is often useful to require an SMTP host or client to authenticate before allowing messages transfer. You can choose from the Anonymous, Basic, or Integrated Windows authentication methods . You can also configure TLS encryption for the virtual server.