Question 1

What is the purpose of the DHCP server? A - to provide storage for email B - to translate URLs to IP addresses C - to translate IPv4 addresses to MAC addresses D - to provide an IP configuration information to hosts

Accepted Answer

: D Explanation:The main purpose of the DHCP server is to provide IP configuration parameters to hosts such as the default gateway, domain name, Domain Name System – DNS

Question 2

An administrator issues the command A. The PC host PC1 has connectivity with a local host B. The PC host PC1 has connectivity with a Layer 3 device C. The PC host PC1 has a default gateway correctly configured D. The PC host PC1 has connectivity up …

Accepted Answer

: E Explanation: The “ping 127001″ command is used to troubleshoot the local network card and the TCP/IP stack to make sure is working correctly If an ICMP echo reply is received, that shows there are connectivity to a particular host in the network

Question 3

What must be configured on the network in order for users on the Internet to view web pages located on Web Server 2? A. On router R2, configure a default static route to the 192.168.10.0 network B. On router r2, configure DNS to resolve the URL assi…

Accepted Answer

: C

Question 4

The router address 192.168.10.250 is the default gateway for both the Web Server 2 and Host 1. What is the correct subnet mask for this network? A. 255.255.255.0 B. 255.255.255.192 C. 255.255.255.250 D. 255.255.255.252

Accepted Answer

: A

Question 5

In practical IPv6 application, The encapsulation of IPv6 packets inside IPv4 packets is called what? A. tunneling B. hashing C. routing D. NAT

Accepted Answer

: A Explanation: Remember, most network is still build on IPv4 structure and IPv4 is not going away in a hurry… one of the many techniques used to migrate to IPv6 is Tunneling Tunneling is a method that a network built on IPv4 structure can be configured to traffic IPv6 packet simultaneously

Question 6

Identify the fields in the Data Link portion of an Ethernet frame?

Accepted Answer

The fields in the Data Link portion of a frame include the Preamble, Start Frame Delimiter, Destination MAC address, Source MAC address, Length or Type, Data, and Frame Check Sequence

Question 7

How does DHCP client ensure that no other computer has its assigned IP address?

Accepted Answer

To stop possible address conflicts , a DHCP client will use gratuitous ARP (broadcast an ARP request for its own IP address) to see if another host responds.

Question 8

What is the address range of a Class B network address in binary?

Accepted Answer

The range of a Class B network address is 128 - 191. This makes our binary range 10xxxxxx.

Question 9

Which of the following allows a router to respond to an ARP request that is intended for a remote host?

Accepted Answer

Proxy ARP can help machines on a subnet reach remote subnets without configuring routing or a default gateway.

Question 10

What is the 127.0.0.1 address used for?

Accepted Answer

Loop back or diagnostics

Question 11

What is the Classs A Private IP address space?

Accepted Answer

10000 through 10255255255

Question 12

What is the Class B private IP address space?

Accepted Answer

1721600 through 17231255255

Question 13

What is the Class C private IP address space?

Accepted Answer

19216800 through 192168255255

Question 14

Describe the functions of DNS and DHCP in the network?

Accepted Answer

Dynamic Host Configuration protocol (DHCP) provides network configuration information (including IP address) to hosts, eliminating the need to perform the configurations manually Domain Name Service (DNS)resolves hostnames - both internet names such as wwwroutersimcom and device names such as workstation 2 to IP addresses, eliminating the need to know the IP address of a device for connection purposes

Question 15

Which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses?

Accepted Answer

A point-to-point link uses only two hosts. A/30, or 255.255.255.252, mask provides two hosts per subnet.

Question 16

What is the subnetwork address for a host with the IP address 200.10.5.68/28?

Accepted Answer

This is a pretty simple question. A/28 is 255.255.255.240, which means that our block size is 16 in the fourth octent. 0,16, 32, 48, 64, 80, etc. The host is in the 64 subnet.

Question 17

What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet mask?

Accepted Answer

A/27 (255.255.255.224) is 3 bits on and 5 bits off. This provides 8 subnets, each with 30 hosts. Does it matter if this mask is used with a Class A, B, or C network address? Not at all. The number of host bits would never change.

Question 18

Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.25.224?

Accepted Answer

A Class C subnet mask of 255.255.255.224 is 3 bits on and 5 bits off (11100000) and provides 8 subnets, each with 30 hosts. However, if the command ip subnet-zero is not used, then only 6 subnets would be available for use.

Question 19

To test the IP stack on your local host, which IP address would you ping?

Accepted Answer

To test the localstack on your host, ping the loop back interface of 127.0.0.1

Question 20

The network address used to advertise a summary address is always which of the following?

Accepted Answer

The network address used to advertise a summary address is always the first network in the block

CISCO Certification Questions