Microsoft Microsoft Certifications 98-366 Questions & Answers

• Question 141:

  What is the default subnet mask for a Class C Internet network?

  A. 255.255.255.252

  B. 255.255.255.240

  C. 255.255.255.192

  D. 255.255.255.0

  Correct Answer: D

  Class A default subnet mask is 255.0.0.0. Class B default subnet mask is 255.255.0.0. Class C default subnet mask is 255.255.255.0.

• Question 142:

  Teredo tunneling is a protocol that:

  A. Translates Internet Protocol version 4 (IPv4) to Internet Protocol version 6 (IPv6).

  B. Allows IPv6 connectivity through IPv4 devices.

  C. Provides VPN security.

  D. Dynamically allocates IPv6 addresses.

  Correct Answer: B

  Teredo alleviates this problem by encapsulating IPv6 packets within UDP/IPv4 datagrams, which most NATs can forward properly. Thus, IPv6-aware hosts behind NATs can be used as Teredo tunnel endpoints even when they don't have a dedicated public IPv4 address.

• Question 143:

  What type of DNS record maps host names to addresses?

  A. Mail Exchanger (MX) DNS record

  B. Service (SRV) DNS record

  C. Host (A) DNS record

  D. Canonical (CNAME) DNS record

  Correct Answer: C

  An A or Address record (also known as a host record) links a domain to the physical IP address of a computer hosting that domain's services.

• Question 144:

  A service that resolves NetBIOS names to IP addresses is:

  A. Domain Name Service (DNS).

  B. Internet Service Provider (ISP).

  C. Address Resolution Protocol (ARP).

  D. Windows Internet Name Service (WINS).

  Correct Answer: D

  Windows Internet Name Service (WINS) is Microsoft's implementation of NetBIOS Name Service (NBNS), a name server and service for NetBIOS computer names. Effectively, WINS is to NetBIOS names what DNS is to domain names -- a central mapping of host names to network addresses.

• Question 145:

  Which network does the IP address 220.100.100.100 belong to?

  A. 220.100.100.0/24

  B. 220.100.100.1/24

  C. 255.255.255.0/24

  D. 255.255.255.1/24

  Correct Answer: A

• Question 146:

  Which subnet mask is valid?

  A. 255.255.255.240

  B. 255.255.255.228

  C. 255.255.255.164

  D. 255.255.255.245

  Correct Answer: A

  These are valid:

  

• Question 147:

  A computer that has an IP address of 169.254.0.1 cannot access the network. Which of the following services should you confirm is available?

  A. WINS

  B. DNS

  C. DHCP

  D. TFTP

  Correct Answer: C

  169.254.0.1 is an APIPA address. An APIPA address is used when the DHCP server is not available.

• Question 148:

  The command-line tool used to list a host's active incoming connections is:

  A. NETSTAT

  B. IPCONFIG

  C. NSLOOKUP

  D. PING

  Correct Answer: A

  Used without parameters, netstat displays active TCP connections.

  Note: Netstat displays active TCP connections, ports on which the computer is listening, Ethernet statistics, the IP routing table, IPv4 statistics (for the IP, ICMP, TCP, and UDP protocols), and IPv6 statistics (for the IPv6, ICMPv6, TCP over IPv6, and UDP over IPv6 protocols).

• Question 149:

  Which of the following are features of DHCP? (Choose two.)

  A. IP address resolution to canonical names

  B. Secure shell connections

  C. Address reservation

  D. Network file transfer

  E. IP address exclusion

  Correct Answer: CE

  *

  The Dynamic Host Configuration Protocol (DHCP) is a standardized network protocol used on Internet Protocol (IP) networks for dynamically distributing network configuration parameters, such as IP addresses for interfaces and services.

  *

  Some network devices need to use statically assigned IP addresses rather than addresses dynamically assigned through DHCP. For example, DHCP servers must have statically configured IP addresses. Also, some devices (such as

  legacy network printers) do not support DHCP.

  For the devices that need static IP assignments, the company creates an exclusion range from each IP address range.

• Question 150:

  The ping tool is used to: (Choose two.)

  A. Determine the network portion of a host address.

  B. Self-test a host's own network interface.

  C. Determine whether a host is reachable.

  D. Manage a host's session when UDP is used.

  Correct Answer: BC

  Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network and to measure the round-trip time for messages sent from the originating host to a destination computer. To have your PC ping itself, type ping 127.0.0.1.