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- Question
Acknowledgments, sequencing , and flow control are characteristics of which OSI layer?
Options- A. Layer 2
- B. Layer 3
- C. Layer 4
- D. Lawer 7
- Correct Answer
- Layer 4
ExplanationA 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.
- 1. 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
- 2. 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
- 3. What port number is used for DHCP?
Options- A. 67
- B. 68
- C. 69
- D. Both A and B Discuss
- 4. What are the six OSPF route types? Discuss
- 5. What are the purposes of areas in an OSPF network? Discuss
- 6. 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
- 7. What is the bit length and expression form of a MAC address? Discuss
- 8. Differentiate a MAC address and an IP address and describe how and when each address type is used in a network? Discuss
- 9. 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
- 10. 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
CISCO Certification problems
Search Results
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: Both A and B
Correct Answer: Intra-area, inter area, El, E2, Nl, and N2
Correct Answer: Areas allow the design of a hierarchical network Routes can be summarized or blocked in an area to reduce the amount of routing information on internal OSPF routers
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: 48 bits (6 bytes) expressed as a hexadecimal number
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
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.
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