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- Question
Why does the data communication industry use the layered OSI reference model?
- It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.
- It enables equipment from different vendors to use the same electronic components, thus saving research and development funds.
- It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers.
- It encourages industry standardization by defining what functions occur at each layer of the model.
Options- A. 1 only
- B. 1 and 4
- C. 2 and 3
- D. 3 only
- Correct Answer
- 1 and 4
ExplanationThe main advantage of a layered model is that it can allow application developers to change aspects of a program in just one layer of the layer model's specifications.Advantages of using the OSI layered model include, but are not limited to, the following:
It divides the network communication process into smaller and simpler components, thus aiding compo- nent development, design, and troubleshooting;
it allows multiple-vendor development through standardization of network components;
it encourages industry standardization by defining what functions occur at each layer of the model;
it allows various types of network hardware and software to communicate;
More questions
- 1. How many collision domains are created when you segment a network with a 12-port switch?
Options- A. 1
- B. 2
- C. 5
- D. 12 Discuss
Correct Answer: 12
Explanation:
Layer 2 switching creates individual collision domains.- 2. What is the maximum distance with maximum data rate for 802.11g?
Options- A. About 65-75 feet
- B. About 90-100 feet
- C. About 150 feet
- D. Over 200 feet Discuss
Correct Answer: About 90-100 feet
Explanation:
The IEEE 802.11g standard provides a maximum data rate of up to 54Mbps, but you need to be close to the access point, somewhere around 90 to 100 feet.- 3. Which of the following commands will allow you to set your Telnet password on a Cisco router?
Options- A. line telnet 0 4
- B. line aux 0 4
- C. line vty 0 4
- D. line con 0 Discuss
Correct Answer: line vty 0 4
Explanation:
The command line vty 0 4 places you in a prompt that will allow you to set or change your Telnet password.- 4. You need to subnet a network that has 5 subnets, each with at least 16 hosts. Which classful subnet mask would you use?
Options- A. 255.255.255.192
- B. 255.255.255.224
- C. 255.255.255.240
- D. 255.255.255.248 Discuss
Correct Answer: 255.255.255.224
Explanation:
You need 5 subnets, each with at least 16 hosts. The mask 255.255.255.240 provides 16 subnets with 14 hosts-this will not work. The mask 255.255.255.224 provides 8 subnets, each with 30 hosts. This is the best answer.- 5. Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?
Options- A. frame-relay arp
- B. frame-relay map
- C. frame-relay interface-dci
- D. frame-relay lmi-type Discuss
Correct Answer: frame-relay map
Explanation:
If you have a router in your Frame Relay network that does not support IARP, you must create Frame Relay maps on your router, which provide known DLCI-to-IP address mappings.- 6. What VTP mode allows you to change VLAN information on the switch?
Options- A. Client
- B. STP
- C. Server
- D. Transparent Discuss
Correct Answer: Server
Explanation:
Only in server mode can you change VTP information on a switch.- 7. The network address of 172.16.0.0/19 provides how many subnets and hosts?
Options- A. 7 subnets, 30 hosts each
- B. 8 subnets, 8,190 hosts each
- C. 8 subnets, 2,046 hosts each
- D. 7 subnets, 2,046 hosts each Discuss
Correct Answer: 8 subnets, 8,190 hosts each
Explanation:
A CIDR address of /19 is 255.255.224.0. This is a Class B address, so that is only 3 subnet bits, but it provides 13 host bits, or 8 subnets, each with 8,190 hosts.- 8. Which command will allow you to see real-time translations on your router?
Options- A. show ip nat translations
- B. show ip nat statistics
- C. debug ip nat
- D. clear ip nat translations * Discuss
Correct Answer: debug ip nat
Explanation:
The command debug ip nat will show you in real time the translations occurring on your router.- 9. Which of the following is an IEEE standard for frame tagging?
Options- A. ISL
- B. 802.3Z
- C. 802.1Q
- D. 802.3U Discuss
Correct Answer: 802.1Q
Explanation:
802.1Q was created to allow trunked links between disparate switches.- 10. Which command will display all the EIGRP feasible successor routes known to a router?
Options- A. show ip routes *
- B. show ip eigrp summary
- C. show ip eigrp topology
- D. show ip eigrp adjacencies Discuss
Correct Answer: show ip eigrp topology
Explanation:
Any secondary route to a remote network is considered a feasible successor, and those routes are only found in the topology table and used as backup routes in case of primary route failure. You can see the topology table with the show ip eigrp topology command.
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