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このような驚くべきデータを疑うかもしれませんが、この業界では想像もできません。しかし、当社の100-150試験問題は合格しました。 100-150学習教材のパフォーマンスにどれだけの努力を注ぎ、どれだけ重視するかを想像できます。 99％の合格率を使用して、100-150練習教材が試験に合格して夢を実現するのに役立つことを証明しています。 100-150試験問題で確実に合格するすべての顧客を保証するため、ほとんどの受験者は100-150ガイド資料に情熱を示しています。
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100-150試験問題には他にも多くの利点があります。 100-150学習ガイドを完全に理解するため。まず、100-150試験トレントの機能と機能の紹介をご覧ください。Cisco製品のページではデモを提供しており、購入前にタイトルの一部を理解し、ソフトウェアを開いた後のソフトウェアの形式を確認できます。クライアントは、Webサイトの製品のページにアクセスできます。したがって、クライアントは100-150クイズトレントをよく理解し、100-150試験問題を購入するかどうかを希望に応じて決定できます。
質問 # 25
Which OSI layer is responsible for logical addressing and routing packets between different networks across interconnected systems?
正解：B
解説：
The Network layer handles logical addressing such as IP addresses and determines the best path for data transmission between networks, ensuring packets reach their correct destination across multiple interconnected systems.
質問 # 26
A user reports that a company website is not available. The help desk technician issues a tracertcommand to determine if the server hosting the website is reachable over the network.
The output of the command is shown as follows:
What can you tell from the command output?
正解：C
解説：
Despite the timeout at hop 3, the trace reaches 192.168.1.10 at hop 5, indicating the server is reachable over the network.
質問 # 27
A local company requires two networks in two new buildings. The addresses used in these networks must be in the private network range.
Which two address ranges should the company use? (Choose 2.)
Note: You will receive partial credit for each correct selection.
正解：A、D
解説：
The private IP address ranges that are set aside specifically for use within private networks and not routable on the internet are as follows:
* Class A: 10.0.0.0 to 10.255.255.255
* Class B: 172.16.0.0 to 172.31.255.255
* Class C: 192.168.0.0 to 192.168.255.255
These ranges are defined by the Internet Assigned Numbers Authority (IANA) and are used for local communications within a private network123.
Given the options: A. 172.16.0.0 to 172.31.255.255 falls within the Class B private range. B. 192.16.0.0 to
192.16.255.255 is not a recognized private IP range. C. 11.0.0.0 to 11.255.255.255 is not a recognized private IP range. D. 192.168.0.0 to 192.168.255.255 falls within the Class C private range.
Therefore, the correct selections that the company should use for their private networks are A and D.
References :=
* Reserved IP addresses on Wikipedia
* Private IP Addresses in Networking - GeeksforGeeks
* Understanding Private IP Ranges, Uses, Benefits, and Warnings
質問 # 28
During the data encapsulation process, which OSI layer adds a header that contains MAC addressing information and a trailer used for error checking?
正解：A
解説：
During the data encapsulation process, the Data Link layer of 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 detection 1 .
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 # 29
A user at your company cannot connect to websites on the internet. However, they can connect to network resources on the company LAN.
You want to use the divide-and-conquer approach to troubleshoot the issue.
What should you do first?
正解：D
解説：
Ping the default gateway from the user ' s computer.
The divide-and-conquer troubleshooting methodology begins at an intermediate OSI layer, typically Layer 3 (Network), rather than systematically examining all seven layers from the top or bottom.
In this scenario, the user can access resources on the local area network but cannot reach websites on the internet.
This suggests that basic local connectivity is operational, although it does not establish whether the computer can communicate with its default gateway.
The most appropriate initial diagnostic action is to ping the default gateway.
A successful ping verifies IP-layer communication with the local router and provides evidence that the underlying LAN connectivity is functioning.
If the ping succeeds, troubleshooting can proceed toward upstream routing, DNS resolution, firewall policies, or internet connectivity.
If the ping fails, the technician should investigate the configured gateway address, VLAN membership, local routing, and Layer 2 connectivity.
Why the other options are incorrect:
A). Telnet tests TCP connectivity to a specific service and is not the preferred initial Layer 3 diagnostic test.
B). Checking the network adapter follows a lower-layer troubleshooting approach.
C). Inspecting cable connections begins at the Physical layer, which is characteristic of bottom-up troubleshooting.
Therefore, Option D correctly applies the divide-and-conquer methodology.
Cisco Press+1
References:
Cisco Certified Support Technician Networking (100-150) - Troubleshooting Methodologies and Diagnostic Tools.
Cisco Press - Troubleshooting Methods for Cisco IP Networks, Divide-and-Conquer Approach.
Cisco Troubleshooting TCP/IP - Checking Local Connectivity and Default Gateway Reachability.
質問 # 30
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