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- Question
Differentiate a MAC address and an IP address and describe how and when each address type is used in a network?
- Correct Answer
- A MAC address is a hexadecimal number identifying the physical connection of a host MAC addresses are said to operate on layer 2 of the OSI model IP addresses, which can be expressed in binary or decimal format, are logical identifiers that are said to be on layer 3 of the OSI model Hosts on the same physical segment locate one another with MAC addresses, while IP addresses are used when they reside on different LAN segments or subnets Even when the hosts are in different subnets , a destination IP address will be converted to a MAC address when the packet reaches the destination network via routing
- 1. What is the bit length and expression form of a MAC address? Discuss
- 2. Which layer chooses and determines the availability of communicating partners along with the resources necessary to make the connection, coordinates partnering applications, and forms a consensus on procedures for controlling data integrity and error recovery? Discuss
- 3. Acknowledgments, sequencing , and flow control are characteristics of which OSI layer?
Options- A. Layer 2
- B. Layer 3
- C. Layer 4
- D. Lawer 7 Discuss
- 4. Which of the following devices do not operate at all levels of the OSI model?
Options- A. Network management stations (NMSs)
- B. Routers
- C. Web and application servers
- D. Network hosts Discuss
- 5. What does a firewall?
Options- A. Examines packets and decides which ones should be allowed to pass from one network to another.
- B. Maintains a table which maps the IP addresses of two network so that packets can be redirected between the networks.
- C. Compares packets to virus signatures so that packets which are know to be dangerous can be identified and stopped.
- D. Prevents viruses from moving any further through a network Discuss
- 6. What type of RJ45 UTP cable do you use to connect a PC's COM port to a router or switch console port?
Options- A. Straight - through
- B. Crossover cable
- C. Crossover with a CSU/DSU
- D. Rolled Discuss
- 7. You have the following binary number :10110111. What are the decimal and hexadecimal equivalents?
Options- A. 69/0x2102
- B. 183/B7
- C. 173/A6
- D. 83/0xC5 Discuss
- 8. Your company wants to reconfigure a Catalyst 2950. Which actions must be taken to erase the old configuration?(Choose three) A. Erase flash B. Restart the switch C. Delete the VLAN database D. Erase the startup configuration Discuss
- 9. If one of the host connected to Sw-AC3 wants to send message to ip 190.0.2.5 (or any ip on a different subnet) what will be the destination MAC address ? Discuss
- 10. Which three IP addresses can be assigned to hosts if the subnet mask is /27 and subnet zero is usable? A. 10.15.32.17 B. 17.15.66.128 C. 66.55.128.1 D. 135.1.64.34 E. 129.33.192.192 F. 192.168.5.63 Discuss
CISCO Certification problems
Search Results
Correct Answer: 48 bits (6 bytes) expressed as a hexadecimal number
Correct Answer: The application layer is responsible for finding the network resources broadcast from a server and adding flow control and error control (if the application developer chooses)
Correct Answer: Layer 4
Explanation:
A reliable Transport layer connection uses acknowledgments to make sure all data is transmitted and received reliably. A reliable connection is defined by a virtual circuit that uses acknowledgments, sequencing, and flow control, which are characteristics of the transport layer.
Correct Answer: Routers
Explanation:
Routersoperate no higher than layer 3 of the OSI model.
Correct Answer: Examines packets and decides which ones should be allowed to pass from one network to another.
Correct Answer: Rolled
Explanation:
To connect to a router or switch console port, you would use an RJ45 UTP rolled cable.
Correct Answer: 183/B7
Explanation:
You must be able to take a binary number and convert it into both decimal and hexadecimal. To convert to decimal, just add up the 1s using their values. The values that are turned on with the binary number of 10110111 are 128+32+16+4+2+1=183. To get the hexadecimal equivalent, you need to break the eight binary digits into nibbles (4 bits), 1011 and 0111. By adding up these values, you get 11 and 7. In hexadecimal, 11 is B, so the answer is 0xB7.
Correct Answer: Answer: B C D
Correct Answer: and Explanation: Because the destination address is on a different subnet from the switch, the packet will be forwarded to its default gateway To verify the default gateway of this switch, use the show running-config command From the output above, we can see that its default-gateway is 1921681254 Which can be said to be a layer 3 device (router); in this case, the VLAN-R1 router You can use the show cdp neighbor detail command verify further From the output above, you can confirm that the switch's default gateway is VLAN-R1 router (with the IP address of 1921681254)The interface FastEthernet0/3 shows that the switch is directly connected to VLAN-R1 router through the switchport Fa0/3 To verify the MAC address associated this interface is interface, you use the show mac-address-table command: Looking closely at the table above, you will discorver that the corresponding MAC address is 000ab7e98360 Although there are some entries on port Fa0/3 with different Vlans ,but they have the same MAC address From the output above, you can confirm that the switch's default gateway is VLAN-R1 router (with the IP address of 1921681254)The interface FastEthernet0/3 shows that the switch is directly connected to VLAN-R1 router through the switchport Fa0/3 To verify the MAC address associated this interface is interface, you use the show mac-address-table command
Correct Answer: : A C D Explanation: If you follow the cram table, /27 is mask 255255255224 3 bits were borrowed with value of 32 Follow the fourth octets of the addresses: A is a usable host address B is classified as a network address C is a usable host address form the subnet 0 D is a usable host address E is a network address F is a broadcast address
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