[2024年10月16日] CCST-Networking日本語のPDF問題とテストエンジンには42問があります
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質問 # 11
帯域幅とスループットに関する各ステートメントについて、True または False を選択します。
注意: 正しい選択ごとに部分的なポイントが付与されます。
正解：
解説：
Explanation:
* Statement 1: Low bandwidth can increase network latency.
* True: Low bandwidth can result in increased network latency because the network may become congested, leading to delays in data transmission.
* Statement 2: High levels of network latency decrease network bandwidth.
* False: High levels of network latency do not decrease the available network bandwidth, but they do affect the perceived performance and throughput of the network.
* Statement 3: You can increase throughput by decreasing network latency.
* True: Decreasing network latency can increase throughput because data can be transmitted more quickly and efficiently without delays.
* Bandwidth vs. Latency: Bandwidth refers to the maximum rate at which data can be transferred over a network path. Latency is the time it takes for a data packet to travel from the source to the destination.
* Low bandwidth can cause network congestion, which can increase latency as packets wait to be transmitted.
* High latency does not reduce the actual bandwidth but can affect the overall performance and efficiency of data transmission.
* Reducing latency can lead to higher throughput because the network can handle more data in a given period without delays.
References:
* Network Performance Metrics: Cisco Network Performance
* Understanding Bandwidth and Latency: Bandwidth vs. Latency
質問 # 12
ヘルプ デスクの技術者は、以下にリストされている 4 つのトラブル チケットを受け取ります。どのチケットを最も優先して最初に対処する必要がありますか?
- A. チケット 1: ユーザーが、同じオフィス内の別のネットワーク ジャックにプリンターを再配置することを要求します。ジャックにパッチを適用してアクティブにする必要があります。
- B. チケット 2: 会議室でオンライン ウェビナーが開催されています。ビデオ会議機器のインターネット アクセスが失われました。
- C. チケット 4: 2 人のユーザーから、カフェテリアのワイヤレス アクセスが過去 1 時間ダウンしていると報告がありました。
- D. チケット 3: ユーザーから、クラウドベースのアプリケーションの応答時間が通常よりも遅いという報告がありました。
正解：B
解説：
When prioritizing trouble tickets, the most critical issues affecting business operations or high-impact activities should be addressed first. Here's a breakdown of the tickets:
* Ticket 1: Relocation of a printer, while necessary, is not urgent and does not impact critical operations.
* Ticket 2: An ongoing webinar losing internet access is critical, especially if the webinar is time-sensitive and involves multiple participants.
* Ticket 3: Slower response time for a cloud-based application is important but typically not as urgent as a complete loss of internet access for a live event.
* Ticket 4: Wireless access down in the cafeteria affects users but does not have the same immediate impact as a live webinar losing connectivity.
Thus, the correct answer is B. Ticket 2: An online webinar is taking place in the conference room. The video conferencing equipment lost internet access.
References:=
* IT Help Desk Best Practices
* Prioritizing IT Support Tickets
質問 # 13
AAA サービス セキュリティ モデルのどのコンポーネントが ID 検証を提供しますか?
- A. 承認
- B. 監査
- C. 会計
- D. 認証
正解：D
解説：
The AAA service security model consists of three components: Authentication, Authorization, and Accounting.
*Authentication: This is the process of verifying the identity of a user or device. It ensures that only legitimate users can access the network or service.
*Authorization: This determines what an authenticated user is allowed to do or access within the network.
*Auditing/Accounting: This component tracks the actions of the user, including what resources they access and what changes they make.
Thus, the correct answer is C. Authentication.
References :=
*Cisco AAA Overview
*Understanding AAA (Authentication, Authorization, and Accounting)
質問 # 14
レイヤー 2 スイッチの管理 VLAN インターフェイスに IP アドレスを割り当てる目的は何ですか?
- A. TelnetまたはSSH経由でスイッチのCLIにアクセスできるようにする
- B. スイッチがネットワーク内の他のスイッチにDHCPサービスを提供できるようにする
- C. スイッチが接続されたデバイスのURLを解決できるようにするには
- D. スイッチが接続されたデバイスのデフォルトゲートウェイとして機能するようにする
正解：A
解説：
The primary purpose of assigning an IP address to the management VLAN interface on a Layer 2 switch is to facilitate remote management of the switch. By configuring an IP address on the management VLAN, network administrators can access the switch's Command Line Interface (CLI) remotely using protocols such as Telnet or Secure Shell (SSH). This allows for convenient configuration changes, monitoring, and troubleshooting without needing physical access to the switch1.
References :=
*Understanding the Management VLAN
*Cisco - VLAN Configuration Guide
*Remote Management of Switches
Assigning an IP address to the management VLAN interface (often the VLAN 1 interface by default) on a Layer 2 switch allows network administrators to remotely manage the switch using protocols such as Telnet or SSH. This IP address does not affect the switch's ability to route traffic between VLANs but provides a means to access and configure the switch through its Command Line Interface (CLI).
*A: The switch does not act as a default gateway; this is typically a function of a Layer 3 device like a router.
*B: The switch does not resolve URLs; this is typically a function of DNS servers.
*C: The switch can relay DHCP requests but does not typically provide DHCP services itself; this is usually done by a dedicated DHCP server or router.
Thus, the correct answer is D. To enable access to the CLI on the switch through Telnet or SSH.
References :=
*Cisco VLAN Management Overview
*Cisco Catalyst Switch Management
質問 # 15
次の出力を表示するコマンドはどれですか?
- A. MACアドレステーブルを表示する
- B. IPインターフェースを表示
- C. 在庫を表示
- D. CDPネイバーを表示
正解：D
解説：
The command that will display the output provided, which includes capability codes, local interface details, device IDs, hold times, and platform port ID capabilities, is the show cdp neighbor command. This command is used in Cisco devices to display current information about neighboring devices detected by Cisco Discovery Protocol (CDP), which includes details such as the interface through which the neighbor is connected, the type of device, and the port ID of the device1.
References :=
*Cisco - show cdp neighbors
The provided output is from the Cisco Discovery Protocol (CDP) neighbor table. The show cdp neighbor command displays information about directly connected Cisco devices, including Device ID, Local Interface, Holdtime, Capability, Platform, and Port ID.
*A. show mac-address-table: Displays the MAC address table on the switch.
*C. show inventory: Displays information about the hardware inventory of the device.
*D. show ip interface: Displays IP interface status and configuration.
Thus, the correct answer is B. show cdp neighbor.
References :=
*Cisco CDP Neighbor Command
*Understanding CDP
質問 # 16
次の出力を調べます。
tracert コマンドの出力から、どの 2 つの結論を導き出すことができますか? (2 つ選択してください) 注: 正解ごとに部分的なポイントが付与されます。
- A. トレースは www.cisco.com サーバーに正常に到達しました。
- B. トレース送信デバイスの IPv6 アドレスは 2600:1408:c400:38d :: b33 です。
- C. www.cisco.com サーバに関連付けられている IPv6 アドレスは 2600:1408: c400: 38d: : b33 です。
- D. ホップ 5 と 6 のルータはオフラインです。
- E. 4 回目のホップ後にトレースが失敗しました。
正解：A、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 # 17
Cisco スイッチはネットワークからアクセスできません。実行中の設定を表示する必要があります。
どのアウトオブバンド方式を使用してアクセスできますか?
- A. SSH
- B. Telnet
- 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 # 18
各ネットワーク タイプを左側のリストから右側の正しい例に移動します。
正解：
解説：
Explanation:
* Two home office computers are connected to a switch by Ethernet cables.
* Network Type: LAN (Local Area Network)
* Explanation: A LAN connects devices within a limited area such as a home, office, or building, using Ethernet cables or Wi-Fi.
* Three government buildings in the same city connect to a cable company over coaxial cables.
* Network Type: MAN (Metropolitan Area Network)
* Explanation: A MAN connects networks across a city or campus, often using fiber optic or coaxial cables.
* A cell phone connects to a Bluetooth headset.
* Network Type: PAN (Personal Area Network)
* Explanation: A PAN connects devices within a personal workspace, typically using wireless technologies like Bluetooth.
* A financial institution connects its branches through a telecommunications service provider.
* Network Type: WAN (Wide Area Network)
* Explanation: A WAN connects multiple LANs over long distances, often using leased lines or satellite links provided by telecommunications companies.
* LAN (Local Area Network): Used for connecting devices within a small geographical area such as a
* single building or home.
* MAN (Metropolitan Area Network): Covers a larger geographical area than a LAN, typically a city or campus.
* PAN (Personal Area Network): Connects devices within the range of an individual person, such as connecting a phone to a Bluetooth headset.
* WAN (Wide Area Network): Spans large geographical areas, connecting multiple LANs across cities, countries, or continents.
References:
* Network Types Overview: Cisco Networking Basics
* Understanding Different Network Types: Network Types Guide
質問 # 19
UDP セグメントのヘッダーにはどのような情報が含まれていますか?
- A. シーケンス番号
- B. IPアドレス
- C. ポート番号
- D. MAC アドレス
正解：C
解説：
The header of a UDP (User Datagram Protocol) segment includesport numbers. Specifically, it contains the source port number and the destination port number, which are used to identify the sending and receiving applications. UDP headers do not include IP addresses or MAC addresses, as those are part of the IP and Ethernet frame headers, respectively.Additionally, UDP does not use sequence numbers, which are a feature of TCP (Transmission Control Protocol) for ensuring reliable delivery of data segments1.
References:=
* Segmentation Explained with TCP and UDP Header
* User Datagram Protocol (UDP) - GeeksforGeeks
* Which three fields are used in a UDP segment header
* UDP Header: The header of a UDP segment includes the following key fields:
* Source Port: The port number of the sending application.
* Destination Port: The port number of the receiving application.
* Length: The length of the UDP header and data.
* Checksum: Used for error-checking the header and data.
* IP Addresses: These are included in the IP header, not the UDP header.
* Sequence Numbers: These are part of the TCP header, not UDP.
* MAC Addresses: These are part of the Ethernet frame header and are not included in the UDP header.
References:
* RFC 768 - User Datagram Protocol: RFC 768
* Cisco Guide on UDP: Cisco UDP Guide
質問 # 20
IP アドレス、ポート番号、またはアプリケーションに基づいてトラフィックを許可または拒否することでネットワークを保護するデバイスはどれですか?
- A. 侵入検知システム
- B. ファイアウォール
- C. アクセスポイント
- D. VPNゲートウェイ
正解：B
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 # 21
192.168.200.0/24 ネットワークに含まれるアドレスはどれですか?
- A. 192.168.1.13
- B. 192.168.201.13
- C. 192.168.199.13
- D. 192.168.200.13
正解：D
解説：
*192.168.200.0/24 Network: This subnet includes all addresses from 192.168.200.0 to 192.168.200.255. The
/24 indicates a subnet mask of 255.255.255.0, which allows for 256 addresses.
*192.168.199.13: This address is in the 192.168.199.0/24 subnet, not the 192.168.200.0/24 subnet.
*192.168.200.13: This address is within the 192.168.200.0/24 subnet.
*192.168.201.13: This address is in the 192.168.201.0/24 subnet, not the 192.168.200.0/24 subnet.
*192.168.1.13: This address is in the 192.168.1.0/24 subnet, not the 192.168.200.0/24 subnet.
References:
*Subnetting Guide: Subnetting Basics
質問 # 22
ヘルプ デスクの技術者は、以下にリストされている 4 つのトラブル チケットを受け取ります。どのチケットを最も優先して最初に対処する必要がありますか?
- A. チケット 1: ユーザーが、同じオフィス内の別のネットワーク ジャックにプリンターを再配置することを要求します。ジャックにパッチを適用してアクティブにする必要があります。
- B. チケット 2: 会議室でオンライン ウェビナーが開催されています。ビデオ会議機器のインターネット アクセスが失われました。
- C. チケット 4: 2 人のユーザーから、カフェテリアのワイヤレス アクセスが過去 1 時間ダウンしていると報告がありました。
- D. チケット 3: クラウドベースのアプリケーションの応答時間が通常よりも遅いとユーザーが報告しました。
正解：B
質問 # 23
MFA 要素を左側のリストから右側の正しい例に移動します。各要素は 1 回、複数回、またはまったく使用しないこともできます。
注意: 正しい選択ごとに部分的なポイントが付与されます。
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 # 24
ネットワーク上のすべてのユーザーがアクセスできるファイルを保存したい。
どのエンドポイントデバイスが必要ですか?
- A. ハブ
- B. アクセスポイント
- C. スイッチ
- D. サーバー
正解：D
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 # 25
ユーザーのコンピューター上のアプリでデータのダウンロードに問題が発生しています。アプリはデータのダウンロードに次の URL を使用します。
https://www.companypro.net:7100/api
その URL との間で送受信されるパケットをキャプチャするには、Wireshark を使用する必要があります。
結果をフィルタリングするためにどの Wireshark フィルタ オプションを使用しますか? 各ドロップダウン リストから正しいオプションを選択してコマンドを完了します。
注意: 正しい選択ごとに部分的なポイントが付与されます。
正解：
解説：
Explanation:
To capture packets sent to and received from the URLhttps://www.companypro.net:7100/apiusing Wireshark, you would use the following filter options:
* Protocol:tcp
* Filter Type:port
* Port Number:7100
This filter setup in Wireshark will display all TCP packets that are sent to or received from port 7100, which is the port specified in the URL for the API service. Since HTTPS typically uses TCP as the transport layer protocol, filtering by TCP and the specific port number will help isolate the relevant packets for troubleshooting the app's data download issues.
* cp: The app is using HTTPS, which relies on the TCP protocol for communication.
* port: The specific port number used by the application, which in this case is 7100.
* 7100: This is the port specified in the URL (https://www.companypro.net:7100/api).
This filter will capture all TCP traffic on port 7100, allowing you to analyze the packets related to the application's data download.
References:
* Wireshark Filters: Wireshark Display Filters
質問 # 26
新しい Cisco スイッチを購入し、電源を入れてコンソール ポートに接続します。次に、次のコマンドを実行します。
出力に関する各ステートメントに対して、True または False を選択します。
注意: 正しい選択ごとに部分的なポイントが付与されます。
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 # 27
データのカプセル化プロセス中に、MAC アドレス情報とエラー チェックに使用されるトレーラーを含むヘッダーを追加する OSI レイヤーはどれですか。
- A. 輸送
- B. ネットワーク
- C. セッション
- D. データリンク
正解：D
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 # 28
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