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| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | CCST Networking Exam |
| Exam Number: | 100-150 |
| Available Languages: | English, Chinese, Spanish, Portuguese, Arabic, Japanese, French |
| Real Exam Qty: | 40-50 |
| Passing Score: | Not publicly disclosed |
| Exam Price: | USD 125 |
| Certificate Validity Period: | 5 years |
| Exam Format: | Drag-and-drop, Multiple-select, Multiple-choice |
| Exam Duration: | 50 minutes |
| Related Certifications: | CCST Support CCST Cybersecurity CCNA |
| Recommended Training: | Cisco Networking Academy Cisco Official Training |
| Exam Registration: | Pearson VUE Registration Cisco Official Exam Page |
| Sample Questions: | Cisco 100-150 Sample Questions |
| Exam Way: | Online proctored (OnVUE) or onsite at Pearson VUE test centers |
| Pre Condition: | No prerequisites required |
| Official Syllabus URL: | https://www.cisco.com/site/us/en/learn/training-certifications/exams/ccst-networking.html |
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10. Frage
Move each protocol from the list on the left to its correct example on the right.
Antwort:
Begründung:
Explanation:
The correct matching of the protocols to their examples is as follows:
* DHCP: Assign the reserved IP address 10.10.10.200 to a web server at your company.
* DNS: Perform a query to translate companypro.net to an IP address.
* ICMP: Perform a ping to ensure that a server is responding to network connections.
Here's how each protocol corresponds to its example:
* DHCP (Dynamic Host Configuration Protocol) is used to assign IP addresses to devices on a network. In this case, DHCP would be used to assign the reserved IP address 10.10.10.200 to a web server.
* DNS (Domain Name System) is used to translate domain names into IP addresses. Therefore, to translate companypro.net to an IP address, DNS would be utilized.
* ICMP (Internet Control Message Protocol) is used for sending error messages and operational information indicating success or failure when communicating with another IP address. An example of this is using the ping command to check if a server is responding to network connections.
These protocols are essential for the smooth operation of networks and the internet.
* Perform a query to translate companypro.net to an IP address.
* DNS (Domain Name System): DNS is used to resolve domain names to IP addresses.
* Assign the reserved IP address 10.10.10.200 to a web server at your company.
* DHCP (Dynamic Host Configuration Protocol): DHCP is used to assign IP addresses to devices on a network.
* Perform a ping to ensure that a server is responding to network connections.
* ICMP (Internet Control Message Protocol): ICMP is used by network devices to send error messages and operational information, and it is the protocol used by the ping command.
* DNS (Domain Name System): DNS translates human-friendly domain names like "companypro.net" into IP addresses that computers use to identify each other on the network.
* DHCP (Dynamic Host Configuration Protocol): DHCP automatically assigns IP addresses to devices on a network, ensuring that no two devices have the same IP address.
* ICMP (Internet Control Message Protocol): ICMP is used for diagnostic or control purposes, and the ping command uses ICMP to test the reachability of a host on an IP network.
References:
* DNS Basics: What is DNS?
* DHCP Overview: What is DHCP?
* ICMP and Ping: Understanding ICMP
11. Frage
Examine the graphic.
Which address should be assigned as the default gateway to the hosts in VLAN 100 and VLAN 110 so that they can reach the internet?
Antwort: A
Begründung:
172.110.0.1.
A default gateway is a Layer 3 device that forwards packets from a local subnet toward destinations outside that subnet.
In the supplied topology, Router1 provides routing connectivity for two distinct VLANs and connects to the ISP for internet access.
VLAN 100:
* Network: 172.100.0.0/16
* Router interface: GigabitEthernet0/0
* Default gateway: 172.100.0.1
VLAN 110:
* Network: 172.110.0.0/16
* Router interface: GigabitEthernet0/1
* Default gateway: 172.110.0.1
Each host must use an appropriate router interface address within its own subnet as its default gateway.
Why the other options are incorrect:
A). The address 10.10.100.1 is not identified as a gateway in the topology.
B). The address 172.0.0.1 does not correspond to either VLAN ' s router interface.
D). The address 10.10.100.78 belongs to Router1 ' s ISP-facing interface, not either internal VLAN.
Correct default gateway configuration enables inter-VLAN communication and forwarding toward the internet. Additional upstream routing and, where applicable, NAT configuration are required for successful internet access.
References:
Cisco CCST Networking (100-150) Official Cert Guide - Chapter 3: Routing and Switching.
Cisco CCST Networking Exam Topics - Objective 4.4: Explain Basic Routing Concepts.
Cisco - Configuring Inter-VLAN Routing with Catalyst 3750 Series Switches.
12. Frage
What is the most compressed valid format of the IPv6 address 2001:0db8:0000:0016:0000:001b:2000:0056?
Antwort: B
Begründung:
IPv6 addresses consist of eight 16-bit hexadecimal groups separated by colons. IPv6 compression simplifies their representation without changing the underlying 128-bit address.
According to Cisco ' s IPv6 addressing documentation, IPv6 compression follows two fundamental rules:
Rule 1: Remove leading zeros.
Leading zeros within each hexadecimal group may be omitted.
The original address becomes:
2001:db8:0:16:0:1b:2000:56
Rule 2: Apply zero compression.
A double colon (::) can represent one or more consecutive all-zero groups. It can appear only once within an IPv6 address.
Applying this compression produces:
2001:db8:0:16::1b:2000:56
Why the other options are incorrect:
A). Correct: Preserves the original address and uses valid IPv6 zero-compression syntax.
B). Incorrect: Uses :: twice, which is prohibited.
C). Incorrect: Omits a required zero group and changes 2000 to 2, altering the original address.
D). Incorrect: Uses :: twice and incorrectly changes the 2000 group.
Technical distinction: Option A is a valid IPv6 representation under RFC 4291. However, RFC 5952 recommends against using :: to compress only one 16-bit zero group. The preferred canonical representation is 2001:db8:0:16:0:1b:2000:56. Because that representation is absent, A is the correct examination answer.
References:
Cisco Certified Support Technician Networking (100-150) - Addressing and Subnet Formats, IPv6 Address Representation and Compression.
Cisco IPv6 Addressing and Basic Connectivity Configuration Guide - IPv6 Address Formats.
RFC 4291 - IP Version 6 Addressing Architecture, Section 2.2.
RFC 5952 - A Recommendation for IPv6 Address Text Representation, Sections 4.1 and 4.2.
13. Frage
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?
Antwort: B
Begründung:
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
14. Frage
Drag and Drop Question
Move each cloud service model on the left to its correct description on the right.
Antwort:
Begründung:
Explanation:
Platform as a Service provides the environment and tools needed to develop, run, and manage applications. Infrastructure as a Service provides virtualized computing resources such as virtual machines and storage on a pay-as-you-go basis. Software as a Service provides ready-to-use applications that users access remotely over the internet.
15. Frage
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