KaoGuTi為你提供了不同版本的資料以方便你的使用。PDF版的JN0-106考古題方便你的閱讀，為你真實地再現考試題目。軟體版本的JN0-106考古題作為一個測試引擎，可以幫助你隨時測試自己的準備情況。如果你想知道你是不是充分準備好了JN0-106考試，那麼你可以利用軟體版的考古題來測試一下自己的水準。這樣你就可以快速找出自己的弱點和不足，進而有利於你的下一步學習安排。
| Section | Objectives |
|---|---|
| Configuration and Monitoring | - Monitoring and troubleshooting tools - System services and users - Interface configuration |
| Networking Fundamentals | - Subnetting concepts - IPv4/IPv6 addressing basics - Routing fundamentals - OSI and TCP/IP models |
| Security and Network Services Basics | - Firewall filters basics - NAT concepts overview |
| Routing Fundamentals in Junos | - Dynamic routing overview - OSPF basics - Static routing |
| Junos OS Fundamentals | - Operational vs configuration mode - Configuration hierarchy and commit model - Junos OS architecture - Junos CLI navigation and commands |
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問題 #93
What are two ways that the carrier-sense multiple access with collision detection (CSMA/CD) MAC protocol help devices "talk" with each other in an Ethernet network? (Choose two.)
答案：B,C
解題說明：
CSMA/CD allows an Ethernet device to check if the network is idle (carrier sense) before attempting to transmit, reducing the chance of collisions.
With CSMA/CD, a device can either transmit or receive data at a given time (half-duplex), not both simultaneously, which helps coordinate communication and manage collisions.
問題 #94
Which two tasks should be performed when creating a new user account on a Junos device?
(Choose two.)
答案：C,D
解題說明：
Creating a new user account in Junos OS involves several specific steps within the [edit system login] configuration hierarchy. To establish a functional and secure user account, an administrator must first define the username and assign that user to a login class. Login classes are essential because they define the permissions and access levels for the user, such as super-user, read- only, or operator. Without a login class, a user would have no permissions to perform tasks within the CLI.
The second mandatory task is to configure an authentication method for the user, most commonly a password. This is typically done using the authentication plain-text-password command, which prompts the administrator to enter and confirm the secret string that the system then hashes and stores. While Junos also supports public-key authentication for SSH, a local password remains the standard for basic access control. It is important to note that SSH access is generally controlled at the system level under [edit system services] and does not need to be enabled on a per-user basis individually. Furthermore, allowing a user to bypass authentication is contrary to the Junos security model and is not a standard task in user account creation.
問題 #95
Click the Exhibit button.
Referring to the exhibit, what is the next hop for IP address 10.0.0.9?
答案：B
解題說明：
Routers use longest prefix match to select the next hop. The address 10.0.0.9 matches the most specific route shown, which is 10.0.0.8/27, so traffic is forwarded to 192.168.2.1.
問題 #96
Exhibit:
Referring to the exhibit, which route will be selected for a packet destined to IP address 10.50.10.55?
答案：D
解題說明：
In Junos OS, the Routing Information Base (RIB) selection process follows a strict hierarchy where the Longest Prefix Match (LPM) is the absolute primary tie-breaker. When a packet is destined for 10.50.10.55
, the Routing Engine searches the inet.0 table for all matching entries. In this exhibit, four routes match: the default route ( 0.0.0.0/0 ), a general static route ( 10.0.0.0/8 ), an OSPF route ( 10.50.0.0/16 ), and a BGP route ( 10.50.10.0/24 ).
The LPM rule dictates that the router must select the most specific route available, which is defined as the entry with the highest number of matching bits in the subnet mask. The 10.50.10.0/24 route matches 24 bits of the destination address, making it more specific than the 16-bit, 8-bit, or 0-bit alternatives. It is critical to understand that route preference (e.g., Static at 5, OSPF at 10, or BGP at 170) is only evaluated if there are multiple paths to the exact same prefix and length. Because these prefixes vary in length, the length takes precedence over the protocol preference. Therefore, the BGP-learned route via 192.168.1.20 is selected as the active path, ensuring traffic follows the most granular routing information provided to the device. Reference:
Routing Fundamentals, Routing Table Selection, Longest Prefix Match.
問題 #97
What is the protocol data unit (PDU) of the Data Link Layer?
答案：C
解題說明：
In the OSI model, the Data Link Layer is responsible for node-to-node delivery of data. It frames the packets received from the Network Layer and prepares them for physical transmission. The Protocol Data Unit (PDU) for the Data Link Layer is called a "frame." Frames encapsulate the network layer packets, adding a header and a trailer that include the hardware addresses of the source and destination, among other things, facilitating the data link layer services like frame synchronization, flow control, and error checking.
問題 #98
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