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Cisco 100-150 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Addressing and Subnet Formats: Covers the distinction between public and private IP addressing, IPv4 subnetting, and IPv6 address and prefix formats.
Topic 2
  • Security: Covers firewall traffic filtering, core security principles including CIA and AAA, and basic wireless security configuration on home routers.
Topic 3
  • Infrastructure: Covers hands-on identification of Cisco hardware, physical cabling in network setups, port types, and the basic concepts behind routing and switching.
Topic 4
  • Diagnosing Problems: Covers structured troubleshooting approaches, packet capture with Wireshark, common diagnostic commands, remote access methods, and basic Cisco show commands.
Topic 5
  • Endpoints and Media Types: Covers physical cabling types, wireless and wired transmission technologies, endpoint device categories, and OS-level network configuration across multiple platforms.

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Exam 100-150 Collection | Valid 100-150 Test Question

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Cisco Certified Support Technician (CCST) Networking Sample Questions (Q39-Q44):

NEW QUESTION # 39
Hotspot Question
Computers in a small office are unable to access companypro.net. You run the ipconfig command on one of the computers. The results are shown in the exhibit.
You need to determine if you can reach the router.

Which command should you use? Complete the command by selecting the correct options from each drop-down list.

Answer:

Explanation:


NEW QUESTION # 40
Hotspot Question
You purchase a new Cisco switch, turn it on, and connect to its console port. You then run the following command:

For each statement about the output, select True or False.
Note: You will receive partial credit for each correct selection.

Answer:

Explanation:


NEW QUESTION # 41
A Cisco PoE switch is shown in the following image.
Which type of port will provide both data connectivity and power to an IP phone?

Answer: A

Explanation:
In the provided image of the Cisco PoE switch, the ports identified with number 6 are the standard RJ-45 Ethernet ports typically found on switches that provide both data connectivity and Power over Ethernet (PoE). PoE ports are designed to supply power to devices such as IP phones, wireless access points, and other PoE-enabled devices directly through the Ethernet cable.
Ports:
* 2: Console port (for management and configuration)
* 3 and 4: Specific function ports (often for management)
* 6: RJ-45 Ethernet ports (capable of providing PoE)
* 7: SFP ports (for fiber connections, typically do not provide PoE) Thus, the correct answer is C. Ports identified with number 6.
Reference: =
* Cisco Catalyst 2960-L Series Switches Data Sheet
* Cisco PoE Overview


NEW QUESTION # 42
In the network shown in the following graphic, Switch1 is a Layer 2 switch.

PC-A sends a frame to PC-C. Switch1 does not have a mapping entry for the MAC address of PC-C. Which action does Switch1 take?

Answer: B

Explanation:
Understanding How Layer 2 Switches Handle Unknown MAC Addresses
Switches operate at Layer 2 (Data Link Layer) of the OSI model and maintain a MAC address table (CAM table) to forward frames efficiently.
* When a switch receives a frame, it checks its MAC address table to see if it knows the destination MAC address.
* If the destination MAC address is not in the table (meaning the switch does not know which port leads to PC-C), the switch follows the flooding behavior.
What Happens When Switch1 Receives a Frame from PC-A to PC-C?
* Switch1 checks its MAC table:
* The source MAC (PC-A) is recorded in the table on port G0/1.
* The destination MAC (PC-C) is not in the table.
* Switch1 does not know where PC-C is:
* It floods the frame out of all active ports except the port it was received on (G0/1).
* This means the frame is sent to:
* Switch2 (via G0/23)
* PC-B (via G0/2)
* Switch2 receives the frame and follows the same process:
* If Switch2 has PC-C's MAC in its table, it forwards the frame appropriately.
* If not, it floods the frame again until PC-C replies.
* Once PC-C responds, Switch1 and Switch2 learn its MAC address and update their tables.
Why Other Options Are Incorrect:
# A. Switch1 queries Switch2 for the MAC address of PC-C.
* Incorrect: Switches do not query other switches directly for MAC addresses. Instead, they rely on learning MAC addresses dynamically through frame forwarding.
# B. Switch1 drops the frame and sends an error message back to PC-A.
* Incorrect: Switches do not drop frames for unknown MAC addresses. Instead, they flood the frames out all ports except the incoming port.
# D. Switch1 sends an ARP request to obtain the MAC address of PC-C.
* Incorrect:
* ARP (Address Resolution Protocol) is only used to resolve IP addresses to MAC addresses.
* Since PC-A is sending a frame (Layer 2), not an IP packet (Layer 3), ARP is not involved here.
Conclusion
Since Switch1 does not know the destination MAC address, it floods the frame out all active ports except the port it was received on. This is the default behavior of Layer 2 switches when they encounter an unknown MAC address.
Thus, the correct answer is:# C. Switch1 floods the frame out all active ports except port G0/1.
References
* Cisco CCNA 200-301 Official Guide - MAC Address Table & Frame Forwarding
* RFC 894 - Standard for Ethernet Frame Forwarding
* Cisco Networking Essentials - Switch Flooding Behavior


NEW QUESTION # 43
What is the main function of ARP in a local network when a device needs to communicate with another device?

Answer: B

Explanation:
ARP maps IP addresses to MAC addresses, enabling devices to locate each other within the same network and properly deliver Ethernet frames to the correct hardware destination.


NEW QUESTION # 44
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