2024年最新の有効なCCST-Networking試験最新問題で2024年最新の学習ガイド
CCST-Networking認定で究極のガイド [2024年更新]
Cisco CCST-Networking 認定試験の出題範囲：
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質問 # 20
A Cisco switch is not accessible from the network. You need to view its running configuration.
Which out-of-band method can you use to access it?
- A. Telnet
- B. SSH
- C. SNMP
- D. Console
正解：D
解説：
Out-of-band management
When a Cisco switch is not accessible from the network, the recommended out-of-band method to access its running configuration is through theconsole port. Out-of-band management involves accessing the network device through a dedicated management channel that is not part of the data network.The console port provides direct access to the switch's Command Line Interface (CLI) without using the network, which is essential when the switch cannot be accessed remotely via the network12.
References:=
* Out-of-band (OOB) network interface configuration guidelines
* Out of band management configuration
If you have any more questions or need further assistance, feel free to ask!
質問 # 21
You want to store files that will be accessible by every user on your network.
Which endpoint device do you need?
- A. Access point
- B. Switch
- C. Server
- D. Hub
正解：C
解説：
To store files that will be accessible by every user on a network, you would need aserver. A server is a computer system that provides data to other computers. It can serve data to systems on a local network (LAN) or a wide network (WAN) over the internet.In this context, a file server would be set up to store and manage files, allowing users on the network to access them from their own devices1.
References:=
* What is a Server?
* Understanding Servers and Their Functions
A server is a computer designed to process requests and deliver data to other computers over a local network or the internet. In this case, to store files that will be accessible by every user on the network, a file server is the appropriate endpoint device. It provides a centralized location for storing and managing files, allowing users to access and share files easily.
* A. Access point: Provides wireless connectivity to a network.
* C. Hub: A basic networking device that connects multiple Ethernet devices together, making them act as a single network segment.
* D. Switch: A networking device that connects devices on a computer network by using packet switching to forward data to the destination device.
Thus, the correct answer is B. Server.
References:=
* File Server Overview (Cisco)
* Server Roles in Networking (Cisco)
質問 # 22
During the data encapsulation process, which OSI layer adds a header that contains MAC addressing information and a trailer used for error checking?
- A. Data Link
- B. Network
- C. Transport
- D. Session
正解：A
解説：
OSI model
During the data encapsulation process, theData Link layerof the OSI model is responsible for adding a header that contains MAC addressing information and a trailer used for error checking.The header typically includes the source and destination MAC addresses, while the trailer contains a Frame Check Sequence (FCS) which is used for error detection1.
The Data Link layer ensures that messages are delivered to the proper device on a LAN using hardware addresses and translates messages from the Network layer into bits for the Physical layer to transmit. It also controls how data is placed onto the medium and is received from the medium through the physical hardware.
References:=
* The OSI Model - The 7 Layers of Networking Explained in Plain English
* OSI Model - Network Direction
* Which layer adds both header and trailer to the data?
* What is OSI Model | 7 Layers Explained - GeeksforGeeks
質問 # 23
Which device protects the network by permitting or denying traffic based on IP address, port number, or application?
- A. Access point
- B. VPN gateway
- C. Firewall
- D. Intrusion detection system
正解：C
解説：
* Firewall: A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It permits or denies traffic based on IP addresses, port numbers, or applications.
* Access Point: This is a device that allows wireless devices to connect to a wired network using Wi-Fi. It does not perform traffic filtering based on IP, port, or application.
* VPN Gateway: This device allows for secure connections between networks over the internet, but it is not primarily used for traffic filtering based on IP, port, or application.
* Intrusion Detection System (IDS): This device monitors network traffic for suspicious activity and policy violations, but it does not actively permit or deny traffic.
References:
* Understanding Firewalls: Firewall Basics
質問 # 24
What is the most compressed valid format of the IPv6 address 2001 :0db8:0000:0016:0000:001b: 2000:0056?
- A. 2001:db8: 0:16: :1b: 2000:56
- B. 2001:db8: 16: :1b:2:56
- C. 2001:db8: : 16: : 1b:2:56
- D. 2001:db8: : 16: : 1b: 2000: 56
正解：A
解説：
IPv6 addresses can be compressed by removing leading zeros and replacing consecutive groups of zeros with a double colon (::). Here's how to compress the address 2001:0db8:0000:0016:0000:001b:2000:0056:
* Remove leading zeros from each segment:
* 2001:db8:0000:0016:0000:001b:2000:0056 becomes 2001:db8:0:16:0:1b:2000:56
* Replace the longest sequence of consecutive zeros with a double colon (::). In this case, the two consecutive zeros between the 16 and 1b:
* 2001:db8:0:16::1b:2000:56
Thus, the most compressed valid format of the IPv6 address is 2001:db8:0:16::1b:2000:56.
References:=
* Cisco Learning Network
* IPv6 Addressing (Cisco)
質問 # 25
Move the MFA factors from the list on the left to their correct examples on the right. You may use each factor once, more than once, or not at all.
Note: You will receive partial credit for each correct selection.
正解：
解説：
Explanation:
The correct matching of the MFA factors to their examples is as follows:
* Entering a one-time security code sent to your device after logging in: Possession
* Holding your phone to your face to be recognized: Inherence
* Specifying your user name and password to log on to a service: Knowledge Here's why each factor matches the example:
* Possession: This factor is something the user has, like a mobile device. A one-time security code sent to this device falls under this category.
* Inherence: This factor is something the user is, such as a biometric characteristic. Facial recognition using a phone is an example of this factor.
* Knowledge: This factor is something the user knows, like a password or PIN.
Multi-Factor Authentication (MFA) enhances security by requiring two or more of these factors to verify a user's identity before granting access.
* Entering a one-time security code sent to your device after logging in.
* Factor: Possession
* Explanation: This factor relates to something you have, such as a device that receives a security code.
* Holding your phone to your face to be recognized.
* Factor: Inference (typically referred to as Inherence or Biometric)
* Explanation: This factor relates to something you are, such as biometric authentication like facial recognition.
* Specifying your username and password to log on to a service.
* Factor: Knowledge
* Explanation: This factor relates to something you know, such as a username and password.
* Possession Factor: This involves something the user has in their possession. Receiving a one-time security code on a device (e.g., phone) is an example of this.
* Inference Factor (Inherence/Biometric): This involves something inherent to the user, such as biometric verification (e.g., facial recognition or fingerprint scanning).
* Knowledge Factor: This involves something the user knows, such as login credentials (username and password).
References:
* Multi-Factor Authentication (MFA) Explained: MFA Guide
* Understanding Authentication Factors: Authentication Factors
質問 # 26
Examine the following output:
Which two conclusions can you make from the output of the tracert command? (Choose 2.) Note: You will receive partial credit for each correct answer.
- A. The trace failed after the fourth hop.
- B. The trace successfully reached the www.cisco.com server.
- C. The IPv6 address associated with the www.cisco.com server is 2600:1408: c400: 38d: : b33.
- D. The routers at hops 5 and 6 are offline.
- E. The device sending the trace has IPv6 address 2600:1408:c400:38d :: b33.
正解：B、C
解説：
*Statement A: "The trace successfully reached the www.cisco.com server." This is true as indicated by the
"Trace complete" message at the end, showing that the trace has reached its destination.
*Statement C: "The IPv6 address associated with the www.cisco.com server is 2600:1408:c400:38d::b33." This is true because the final hop in the trace, which is the destination, has this IPv6 address.
*Statement B: "The trace failed after the fourth hop." This is incorrect as the trace continues beyond the fourth hop, despite some intermediate timeouts.
*Statement D: "The routers at hops 5 and 6 are offline." This is not necessarily true. The routers might be configured to not respond to traceroute requests.
*Statement E: "The device sending the trace has IPv6 address 2600:1408:c400:38d::b33." This is incorrect; this address belongs to the destination server, not the sender.
References:
*Understanding Traceroute: Traceroute Guide
質問 # 27
Which two statements are true about the IPv4 address of the default gateway configured on a host? (Choose 2.) Note: You will receive partial credit for each correct selection.
- A. The IPv4 address of the default gateway must be the first host address in the subnet.
- B. The default gateway is the IPv4 address of the router interface connected to the same local network as the host.
- C. The default gateway is the Loopback0 interface IPv4 address of the router connected to the same local network as the host.
- D. Hosts learn the default gateway IPv4 address through router advertisement messages.
- E. The same default gateway IPv4 address is configured on each host on the local network.
正解：B、E
解説：
*Statement B: "The same default gateway IPv4 address is configured on each host on the local network." This is true because all hosts on the same local network (subnet) use the same default gateway IP address to send packets destined for other networks.
*Statement D: "The default gateway is the IPv4 address of the router interface connected to the same local network as the host." This is true because the default gateway is the IP address of the router's interface that is directly connected to the local network.
*Statement A: "The IPv4 address of the default gateway must be the first host address in the subnet." This is not necessarily true. The default gateway can be any address within the subnet range.
*Statement C: "The default gateway is the Loopback0 interface IPv4 address of the router connected to the same local network as the host." This is not true; the default gateway is the IP address of the router's physical or logical interface connected to the local network.
*Statement E: "Hosts learn the default gateway IPv4 address through router advertisement messages." This is generally true for IPv6 with Router Advertisement (RA) messages, but not typically how IPv4 hosts learn the default gateway address.
References:
*Cisco Default Gateway Configuration: Cisco Default Gateway
質問 # 28
Move the security options from the list on the left to its characteristic on the right. You may use each security option once, more than once, or not at all.
Note: You will receive partial credit for each correct answer.
正解：
解説：
Explanation:
The correct matching of the security options to their characteristics is as follows:
* WPA2-Enterprise: Uses a RADIUS server for authentication
* WEP: Uses a minimum of 40 bits for encryption
* WPA2-Personal: Uses AES and a pre-shared key for authentication
Here's why each security option matches the characteristic:
* WPA2-Enterpriseuses a RADIUS server for authentication, which provides centralized Authentication, Authorization, and Accounting (AAA) management for users who connect and use a network service.
* WEP (Wired Equivalent Privacy)is an outdated security protocol that uses a minimum of 40 bits for encryption (and up to 104 bits), which is relatively weak by today's standards.
* WPA2-Personal(Wi-Fi Protected Access 2 - Personal) uses the Advanced Encryption Standard (AES) for encryption and a pre-shared key (PSK) for authentication, which is shared among users to access the network.
These security options are essential for protecting wireless networks from unauthorized access and ensuring data privacy.
質問 # 29
A user initiates a trouble ticket stating that an external web page is not loading. You determine that other resources both internal and external are still reachable.
Which command can you use to help locate where the issue is in the network path to the external web page?
- A. tracert
- B. nslookup
- C. ipconfig/all
- D. ping -t
正解：A
解説：
The tracert command is used to determine the route taken by packets across an IP network. When a user reports that an external web page is not loading, while other resources are accessible, it suggests there might be an issue at a certain point in the network path to the specific web page. The tracert command helps to diagnose where the breakdown occurs by displaying a list of routers that the packets pass through on their way to the destination. It can identify the network segment where the packets stop progressing, which is valuable for pinpointing where the connectivity issue lies. References := Cisco CCST Networking Certification FAQs - CISCONET Training Solutions, Command Prompt (CMD): 10 network-related commands you should know, Network Troubleshooting Commands Guide: Windows, Mac & Linux - Comparitech, How to Use the Traceroute and Ping Commands to Troubleshoot Network, Network Troubleshooting Techniques: Ping, Traceroute, PathPing.
*tracert Command: This command is used to determine the path packets take to reach a destination. It lists all the hops (routers) along the way and can help identify where the delay or failure occurs.
*ping -t: This command sends continuous ping requests and is useful for determining if a host is reachable but does not provide path information.
*ipconfig /all: This command displays all current TCP/IP network configuration values and can be used to verify network settings but not to trace a network path.
*nslookup: This command queries the DNS to obtain domain name or IP address mapping, useful for DNS issues but not for tracing network paths.
References:
*Microsoft tracert Command: tracert Command Guide
*Troubleshooting Network Issues with tracert: Network Troubleshooting Guide
質問 # 30
Move each protocol from the list on the left to the correct TCP/IP model layer on the right.
Note: You will receive partial credit for each correct match.
正解：
解説：
Explanation:
Here's how each protocol aligns with the correct TCP/IP model layer:
* TCP (Transmission Control Protocol): This protocol belongs to theTransportlayer, which is responsible for providing communication between applications on different hosts1.
* IP (Internet Protocol): IP is part of theInternetworklayer, which is tasked with routing packets across network boundaries to their destination1.
* FTP (File Transfer Protocol): FTP operates at theApplicationlayer, which supports application and end-user processes.It is used for transferring files over the network1.
* Ethernet: While not a protocol within the TCP/IP stack, Ethernet is associated with theNetwork Interfacelayer, which corresponds to the link layer of the TCP/IP model and is responsible for the physical transmission of data1.
The TCP/IP model layers are designed to work collaboratively to transmit data from one layer to another, with each layer having specific protocols that perform functions necessary for the data transmission process1.
* TCP:
* TCP Model Layer: Transport
* Explanation: The Transport layer is responsible for end-to-end communication and error handling. TCP (Transmission Control Protocol) operates at this layer to provide reliable, ordered, and error-checked delivery of data.
* IP:
* TCP Model Layer: Internetwork
* Explanation: The Internetwork layer, also known as the Internet layer, is responsible for logical addressing and routing. IP (Internet Protocol) operates at this layer to route packets across networks.
* FTP:
* TCP Model Layer: Application
* Explanation: The Application layer provides network services to applications. FTP (File Transfer Protocol) operates at this layer to transfer files between computers over a network.
* Ethernet:
* TCP Model Layer: Network
* Explanation: The Network layer, also known as the Link layer in the TCP/IP model, is responsible for physical addressing and access to the physical medium. Ethernet operates at this layer to provide the physical and data link functions.
* Transport Layer: This layer is responsible for providing communication services directly to the application processes running on different hosts. TCP is a core protocol in this layer.
* Internetwork Layer: This layer is responsible for logical addressing, routing, and packet forwarding.
IP is the primary protocol for this layer.
* Application Layer: This layer interfaces directly with application processes and provides common network services. FTP is an example of a protocol operating in this layer.
* Network Layer: In the TCP/IP model, this layer includes both the data link and physical layers of the OSI model. Ethernet is a protocol used in this layer to define network standards and communication protocols at the data link and physical levels.
References:
* TCP/IP Model Overview: Cisco TCP/IP Model
* Understanding the TCP/IP Model: TCP/IP Layers
質問 # 31
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?
- A. Ports identified with number 6
- B. Ports identified with number 7
- C. Ports identified with numbers 3 and 4
- D. Port identified with number 2
正解：A
解説：
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.
References :=
*Cisco Catalyst 2960-L Series Switches Data Sheet
*Cisco PoE Overview
質問 # 32
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.
正解：
解説：
Explanation:
* The two interfaces are administratively shut down:
* False: The output does not show any "shutdown" command under the interfaces, which would indicate that they are administratively shut down. Therefore, they are likely in their default state, which is administratively up.
* The two interfaces have default IP addresses assigned:
* False: The output does not show any IP address configuration. In the default state, interfaces do not have IP addresses assigned unless explicitly configured.
* The two interfaces can communicate over Layer 2:
* True: By default, interfaces on a switch are Layer 2 interfaces capable of forwarding Ethernet frames. As there is no configuration provided that changes this, it can be assumed they can communicate over Layer 2.
* Interface Status: The absence of the "shutdown" command means the interfaces are not administratively shut down.
* IP Address Assignment: There is no evidence in the output that IP addresses have been assigned to the interfaces, which would typically be shown as "ip address" entries.
* Layer 2 Communication: Switch interfaces in their default state operate at Layer 2, enabling them to forward Ethernet frames and participate in Layer 2 communication.
References:
* Cisco IOS Interface Configuration: Cisco Interface Configuration
* Understanding Cisco Switch Interfaces: Cisco Switch Interfaces
質問 # 33
You want to list the IPv4 addresses associated with the host name www.companypro.net.
Complete the command by selecting the correct option from each drop-down list.
正解：
解説：
Explanation:
To list the IPv4 addresses associated with the host name www.companypro.net, you should use the following command:
nslookup www.companypro.net
This command will query the DNS servers to find the IP address associated with the hostname provided.If you want to ensure that it returns the IPv4 address, you can specify the-type=Aoption, which stands for Address records that hold IPv4 addresses1. However, thenslookupcommand by default should return the IPv4 address if available.
To list the IPv4 addresses associated with the host namewww.companypro.net, you should use thenslookup command.
* Command: nslookup
* Target:www.companypro.net
So, the completed command is:
* nslookupwww.companypro.net
* nslookup: This command is used to query the Domain Name System (DNS) to obtain domain name or IP address mapping or for any other specific DNS record.
* www.companypro.net: This is the domain name you want to query to obtain its associated IP addresses.
References:
* Using nslookup: nslookup Command Guide
質問 # 34
Move each cloud computing service model from the list on the left to the correct example on the right Note: You will receive partial credit for each correct answer.
正解：
解説：
Explanation:
* Three virtual machines are connected by a virtual network in the cloud.
* Model: IaaS (Infrastructure as a Service)
* Explanation: IaaS provides virtualized computing resources over the internet, including virtual machines, storage, and networks.
* Users access a web-based graphics design application in the cloud for a monthly fee.
* Model: SaaS (Software as a Service)
* Explanation: SaaS delivers software applications over the internet, typically on a subscription basis, accessible via a web browser.
* A company develops applications using cloud-based resources and tools.
* Model: PaaS (Platform as a Service)
* Explanation: PaaS provides a platform allowing customers to develop, run, and manage applications without dealing with the infrastructure.
* IaaS (Infrastructure as a Service): Provides virtualized hardware resources that customers can use to build their own computing environments.
* PaaS (Platform as a Service): Offers a platform with tools and services to develop, test, and deploy applications.
* SaaS (Software as a Service): Delivers fully functional applications over the internet that users can access and use without managing the underlying infrastructure.
References:
* Cloud Service Models: Understanding IaaS, PaaS, SaaS
* NIST Definition of Cloud Computing:NIST Cloud Computing
質問 # 35
A help desk technician receives the four trouble tickets listed below. Which ticket should receive the highest priority and be addressed first?
- A. Ticket 1: A user requests relocation of a printer to a different network jack in the same office. The jack must be patched and made active.
- B. Ticket 2: An online webinar is taking place in the conference room. The video conferencing equipment lost internet access.
- C. Ticket 3: A user reports that response time for a cloud-based application is slower than usual.
- D. Ticket 4: Two users report that wireless access in the cafeteria has been down for the last hour.
正解：B
質問 # 36
Which standard contains the specifications for Wi-Fi networks?
- A. IEEE 802.11
- B. IEEE 802.3
- C. EIA/TIA 568A
- D. GSM
- E. LTE
正解：A
解説：
The IEEE 802.11 standard contains the specifications for Wi-Fi networks. It is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in various frequencies, including but not limited to 2.4 GHz, 5 GHz, and 6 GHz1.
This standard is maintained by the Institute of Electrical and Electronics Engineers (IEEE) and is commonly referred to as Wi-Fi. The standard has evolved over time to include several amendments that improve speed, range, and reliability of wireless networks.
References :=
*The Most Common Wi-Fi Standards and Types, Explained
*802.11 Standards Explained: 802.11ax, 802.11ac, 802.11b/g/n, 802.11a
*Wi-Fi Standards Explained - GeeksforGeeks
質問 # 37
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