JNCIS-DC 認證一些题的解析
JNCIS-DC（Juniper Networks 認證網絡專業人員數據中心）是 Juniper Networks 提供的中級水平的數據中心技術認證。這個認證專為那些具有一定經驗的數據中心網絡專業人士設計，他們對 Juniper Networks 的 Apstra 軟件和數據中心設備有中等程度的了解。
You use Juniper Apstra to enable a new VXLAN virtual network.
Which two components would be automatically derived in this situation?(Choose two.)
A.IP subnet
B.VLAN-ID
C.VXLAN VNI
D.Route Zone
在使用 Juniper Apstra 啟用新的 VXLAN 虛擬網路時，自動衍生的兩個元件通常是：
A. IP 子網路（IP subnet）
C. VXLAN VNI（VXLAN 網路識別碼）
因此，正確答案是 A 和 C。這兩個元件是 VXLAN 虛擬網路配置的基本要素，其中 IP 子網路用於定義網路的位址空間，而 VXLAN VNI 用於在 VXLAN 網路中區分不同的租用戶或網路區段。
A member of your organization made changes to a predefined interface map using Juniper Apstra.
Which two statements are correct in this scenario?(Choose two.)
A. Changes to interface maps in the global catalog do not affect interface maps that have already been
imported into blueprint catalogs
B. Any changes made to predefined interface maps are discarded when Apstra is upgraded.
C. Changes made to predefined interface maps will not have an impact on the Apstra software.
D. Changes to interface maps in the global catalog will raise anomalies that may need to be addressed
at the next commit.
在 Juniper Apstra 中，如果組織成員對預先定義的介面對映進行了更改，以下兩個敘述是正確的：
A. 變更全域目錄中的介面對映不會影響已匯入藍圖目錄中的介面對應。
D. 對全域目錄中的介面對映進行的變更將在下次提交時觸發異常，這些異常可能需要被解決。
因此，正確答案是 A 和 D。選項 B 和 C 所描述的情況通常不準確。更改預先定義的介面映射可能會影響依賴這些映射的藍圖和部署，而且在軟體升級時，Apstra 通常會保留用戶所做的配置更改，除非升級過程中明確指出了配置的重置或遷移。選項 C 也不正確，因為更改介面映射可能會對 Apstra 軟體的配置和預期行為產生影響。
Juniper Apstra has indicated an anomaly with respect to cabling.
What are two ways to remediate the issue? (Choose two.)
A. Manually edit the cabling map.
B. Redeploy the errant device.
C. Set the invalid ports to a disabled state.
D. Have Apstra autoremediate the cabling map using LLDP.
針對 Juniper Apstra 指出的佈線異常，有兩種補救方法：
A. 手動編輯佈線圖（cabling map）。
D. 讓 Apstra 使用 LLDP 自動補救佈線圖。
正確答案是 A 和 D
Which statement is correct about the Juniper Apstra Rendered configuration?
A. It is built at commit time and stored in a MySQL database.
B. It is stored in a NoSQL database and incrementally updated.
C. It is dynamically tendered at commit time.
D. It is rendered from the graph database and stored locally
正确答案是 C. It is dynamically tendered at commit time.
properly wired and configured. This configuration is non-disruptive to other
services in the fabric. Links are up, but they are configured in L3-mode to
prevent STP/L2 operations.
Hostname is configured per blueprint intent.
All interface descriptions are changed per blueprint intent.
Interfaces are rendered with blueprint interface speeds.
No routing or BGP is configured.
No L3 information is configured on interfaces.
Fabric MTU is modified for spine devices to 9050 bytes.
Deploy Device (Rendered / Active)
CAUTION:
The first time you assign a device and deploy it (set deploy mode to Deploy
and commit the blueprint), you’re triggering a full configuration push on
the device. This action overwrites the complete running configuration with
the pristine configuration, then adds the full rendered Apstra
configuration. Apstra discards any configuration that’s not part of the
Apstra-rendered configuration.
When you commit a device, it becomes Active, and Apstra deploys the
service configuration, moving the device into the Rendered configuration
stage. Rendered config contents are derived from the pristine config, selected
reference design/topology, NOS, and device model. The first rendered config
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