CISCO Certification problems
- 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 Discuss
Correct 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
- 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 to Layer 5 of the OSI model E. The PC host PC1 has the TCP/IP protocol stack correctly installed Discuss
Correct 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
- 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 assigned to Web Server 2 to the 192.168.10.20 address C. On router R1, configure NAT to translate an address on the 209.165.100.0/24 network to 192.168.10.20 D. On router R1, configure DHCP to assign a registered IP address on the 209.165.100.0/24 network to Web Server 2 Discuss
Correct Answer: : C
- 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 Discuss
Correct Answer: : A
- 5. In practical IPv6 application, The encapsulation of IPv6 packets inside IPv4 packets is called what? A. tunneling B. hashing C. routing D. NAT Discuss
Correct 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
- 6. Identify the fields in the Data Link portion of an Ethernet frame? Discuss
Correct 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
- 7. How does DHCP client ensure that no other computer has its assigned IP address?
Options- A. Acknowledge receipt of a TCP segment
- B. Ping to its own address to see if a response is detected
- C. Broadcast a Proxy ARP
- D. Broadcast a gratuitous ARP Discuss
Correct Answer: Broadcast a gratuitous ARP
Explanation:
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.
- 8. What is the address range of a Class B network address in binary?
Options- A. 01xxxxxx
- B. 0xxxxxxx
- C. 10xxxxxx
- D. 110xxxxx Discuss
Correct Answer: 10xxxxxx
Explanation:
The range of a Class B network address is 128 - 191. This makes our binary range 10xxxxxx.
- 9. Which of the following allows a router to respond to an ARP request that is intended for a remote host?
Options- A. Gateway DP
- B. Reverse ARP (RARP)
- C. Proxy ARP
- D. Inverse ARP (IARP) Discuss
Correct Answer: Proxy ARP
Explanation:
Proxy ARP can help machines on a subnet reach remote subnets without configuring routing or a default gateway.
- 10. What is the 127.0.0.1 address used for? Discuss
Correct Answer: Loop back or diagnostics
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