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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. Layer 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 (layer 4). - 1. How often are BPDUs sent from a layer 2 device?
Options- A. Never
- B. Every 2 seconds
- C. Every 10 minutes
- D. Every 30 seconds Discuss
- 2. Which encapsulations can be configured on a serial interface?
- Ethernet
- Token Ring
- HDLC
- Frame Relay
- PPP
Options- A. 1 and 4
- B. 2 only
- C. 3, 4 and 5
- D. All of the above Discuss
- 3. If you use either Telnet or FTP, which is the highest layer you are using to transmit data?
Options- A. Application
- B. Presentation
- C. Session
- D. Transport Discuss
- 4. The DoD model (also called the TCP/IP stack) has four layers. Which layer of the DoD model is equivalent to the Network layer of the OSI model?
Options- A. Application
- B. Host-to-Host
- C. Internet
- D. Network Access Discuss
- 5. You have a Cisco mesh network. What protocol allows multiple APs to connect with many redundant connections between nodes?
Options- A. LWAPP
- B. AWPP
- C. STP
- D. IEEE Discuss
- 6. Where is a hub specified in the OSI model?
Options- A. Session layer
- B. Physical layer
- C. Data Link layer
- D. Application layer Discuss
- 7. Your router has the following IP address on Ethernet0: 172.16.2.1/23. Which of the following can be valid host IDs on the LAN interface attached to the router?
- 172.16.1.100
- 172.16.1.198
- 172.16.2.255
- 172.16.3.0
Options- A. 1 only
- B. 2 and 3 only
- C. 3 and 4 only
- D. None of the above Discuss
- 8. If a host on a network has the address 172.16.45.14/30, what is the subnetwork this host belongs to?
Options- A. 172.16.45.0
- B. 172.16.45.4
- C. 172.16.45.8
- D. 172.16.45.12 Discuss
- 9. Which of the following protocols uses both TCP and UDP?
Options- A. FTP
- B. SMTP
- C. Telnet
- D. DNS Discuss
- 10. A network administrator views the output from the show ip route command. A network that is advertised by both RIP and IGRP appears in the routing table flagged as an IGRP route. Why is the RIP route to this network not used in the routing table?
Options- A. IGRP has a faster update timer.
- B. IGRP has a lower administrative distance.
- C. RIP has a higher metric value for that route.
- D. The IGRP route has fewer hops. Discuss
More questions
Correct Answer: Every 2 seconds
Explanation:
Every 2 seconds, BPDUs are sent out from all active bridge ports by default.
Correct Answer: 3, 4 and 5
Explanation:
Ethernet and Token Ring are LAN technologies and cannot be configured on a serial interface. PPP, HDLC, and Frame Relay are layer 2 WAN technologies that are typically configured on a serial interface.
Correct Answer: Application
Explanation:
Both FTP and Telnet use TCP at the Transport layer; however, they both are Application layer protocols, so the Application layer is the best answer.
Correct Answer: Internet
Explanation:
The four layers of the DoD model are Application/Process, Host-to-Host, Internet, and Network Access. The Internet layer is equivalent to the Network layer of the OSI model.
Correct Answer: AWPP
Explanation:
Each AP in a mesh network runs the Adaptive Wireless Path Protocol (AWPP). This protocol allows RAPs to communicate with each other to determine the best path back to the wired network via the RAP.
Correct Answer: Physical layer
Explanation:
Hubs regenerate electrical signals, which are specified at the Physical layer.
Correct Answer: 3 and 4 only
Explanation:
The router's IP address on the E0 interface is 172.16.2.1/23, which is 255.255.254.0. This makes the third octet a block size of 2. The router's interface is in the 2.0 subnet, and the broadcast address is 3.255 because the next subnet is 4.0. The valid host range is 2.1 through 3.254. The router is using the first valid host address in the range.
Correct Answer: 172.16.45.12
Explanation:
A /30, regardless of the class of address, has a 252 in the fourth octet. This means we have a block size of 4 and our subnets are 0, 4, 8, 12, 16, etc. Address 14 is obviously in the 12 subnet.
Correct Answer: DNS
Explanation:
DNS uses TCP for zone exchanges between servers and UDP when a client is trying to resolve a hostname to an IP address.
Correct Answer: IGRP has a lower administrative distance.
Explanation:
RIP has an administrative distance (AD) of 120, while IGRP has an administrative distance of 100, so the router will discard any route with a higher AD than 100.
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