Microsoft Microsoft Certifications 98-366 Questions & Answers

• Question 131:

  A network that separates an organization's private network from a public network is a/an:

  A. Firewall

  B. Extranet

  C. Perimeter

  D. Internet

  Correct Answer: C

  A network perimeter is the boundary between the private and locally managed-and-owned side of a network and the public and usually provider-managed side of a network.

• Question 132:

  Which of the following uses a tunneling protocol?

  A. Internet

  B. VPN

  C. Extranet

  D. VLAN

  Correct Answer: B

  Tunneling enables the encapsulation of a packet from one type of protocol within the datagram of a different protocol. For example, VPN uses PPTP to encapsulate IP packets over a public network, such as the Internet.

• Question 133:

  Which of these factors has the biggest impact on data transmission speed in a wireless network?

  A. The access method used for the network

  B. The transmission standard of the equipment used

  C. The use of strong encryption for transmissions

  D. The transmission wattage rating used on the NIC

  Correct Answer: B

  The speed of a Wi-Fi wireless network connection depends on several factors.

  Like most kinds of computer networks, Wi-Fi supports varying levels of performance depending on which technology standards it supports. Each Wi-Fi standard is rated according to its maximum theoretical network bandwidth:

  A Wi-Fi network connection operates at the highest possible speed that both devices (endpoints) can support. An 802.11g laptop connected to an 802.11n router, for example, will network at the lower speeds of 'g'.

• Question 134:

  If an 802.llg Internet connection has connectivity problems, what may be the cause?

  A. A cordless phone

  B. A cellular phone

  C. Incandescent lights

  D. Electromagnetic interference (EMI)

  Correct Answer: D

  Over the last 10 years 802.11 technology has made remarkable strides -- getting faster, stronger and more scalable. But one problem still haunts Wi-Fi: reliability.

  Nothing is more frustrating for network managers than users complaining about flaky Wi-Fi performance, spotty coverage and dropped connections. Dealing with a Wi-Fi environment that you can't see and that is constantly changing is the problem. And radio frequency interference is the culprit.

• Question 135:

  VPNs are implemented to provide:

  A. A secure connection within a private network.

  B. A secure connection through public networks.

  C. Additional encryption by using IPSec.

  D. Additional security for selected computers.

  Correct Answer: B

  VPN is a network that is constructed by using public wires -- usually the Internet -- to connect to a private network, such as a company's internal network.

  There are a number of systems that enable you to create networks using the Internet as the medium for transporting data. These systems use encryption and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

• Question 136:

  Two companies want to share data by using the Internet. Which type of network provides the solution?

  A. Ethernet

  B. Intranet

  C. Extranet

  D. Perimeter

  Correct Answer: C

  An extranet is a computer network that allows controlled access from outside of an organization's intranet. Extranets are used for specific use cases including business-to-business (B2B).

• Question 137:

  A Media Access Control (MAC) address identifies a/an:

  A. UPnP device.

  B. Local broadcast domain.

  C. Network interface card (NIC).

  D. Local area network (LAN).

  Correct Answer: C

  A media access control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment.

• Question 138:

  You ping a server by using fully qualified domain name (FQDN) and do not receive a response. You then ping the same server by using its IP address and receive a response. Why do you receive a response on the second attempt but not on the first attempt?

  A. PING is improperly configured.

  B. The DNS is not resolving.

  C. The DHCP server is offline.

  D. NSLOOKUP is stopped.

  Correct Answer: B

  DNS is not working.

• Question 139:

  When a client's DHCP-issued address expires, the client will:

  A. Select a new address and request approval from the DHCP server.

  B. Require manual configuration with a static IP address.

  C. Attempt to obtain a new address by broadcasting.

  D. Continue to use the address until it is notified to stop.

  Correct Answer: C

  Rebinding would occur.

  Rebinding

  If the DHCP client is unable to communicate with the DHCP server from which it obtained its lease, and 87.5 percent of its lease time has expired, it will attempt to contact any available DHCP server by broadcasting DHCPRequest messages.

  Any DHCP server can respond with a DHCPAck message, renewing the lease, or a DHCPNak message, forcing the DHCP client to initialize and restart the lease process.

  Note:

  Renewing

  IP addressing information is leased to a client, and the client is responsible for renewing the lease. By default, DHCP clients try to renew their lease when 50 percent of the lease time has expired. To renew its lease, a DHCP client sends a

  DHCPRequest message to the DHCP server from which it originally obtained the lease.

  Reference: DHCP Client States in the Lease Process

• Question 140:

  The default port used for telnet is:

  A. 23

  B. 25

  C. 80

  D. 8080

  Correct Answer: A

  The telnet protocol is used to establish a connection to Transmission Control Protocol (TCP) port number 23, where a Telnet server application (telnetd) is listening.