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NEW QUESTION: 1
OSPFv3を実装する前に、ipv4ルーティング用に構成された各デバイスで実行する必要がある2つのステップはどれですか？ （2つ選択）
A. ループバックインターフェイスを構成する
B. 自律システム番号を構成します
C. ルーターIDを構成します
D. インターフェースでIPv6を有効にします
E. IPv6ユニキャストルーティングを有効にする
Answer: C,E
Explanation:
Before we can implement OSPFv3 we need to configure an IPv4 router ID (although OSPFv3 deals with IPv6 addresses, it still uses 32-bit router ID) on that device and enable IPv6 unicast routing (via the "ipv6 unicast-routing" in global configuration mode).
Note: If we have already had an active interface, we don't need to configure the router ID for OSPFv3 anymore because the device will automatically choose that IPv4 address for its router ID).

NEW QUESTION: 2
列グループの使用状況を取得し、SHschemaの顧客テーブルのより良い基数予想の拡張統計情報を収集したいと思います。
次の手順を確認します:
1.デュアル声明からSELECTDBMS_STATS. CREATE_EXTENDED_STATS('SH','CUSTOMERS')を発行します。
2.dbms_stats.seed_col_usage (null,'SH',500)プロシージャを実行します。
3.顧客テーブルで必要なクエリーを実行します。
4.デュアル声明から選択dbms_stats.reportwcol_usage('SH', 'customers')を発行します。
正しい手順を識別してください。
A. 3, 2, 4, 1
B. 3, 2, 1, 4
C. 4, 1, 3, 2
D. 2, 3, 4, 1
Answer: D
Explanation:
Explanation
Step 1 (2). Seed column usage
Oracle must observe a representative workload, in order to determine the appropriate column groups. Using the new procedure DBMS_STATS.SEED_COL_USAGE, you tell Oracle how long it should observe the workload.
Step 2: (3) You don't need to execute all of the queries in your work during this window. You can simply run explain plan for some of your longer running queries to ensure column group information is recorded for these queries.
Step 3. (1) Create the column groups
At this point you can get Oracle to automatically create the column groups for each of the tables based on the usage information captured during the monitoring window. You simply have to call the DBMS_STATS.CREATE_EXTENDED_STATS function for each table.This function requires just two arguments, the schema name and the table name. From then on, statistics will be maintained for each column group whenever statistics are gathered on the table.
Note:
* DBMS_STATS.REPORT_COL_USAGE reports column usage information and records all the SQL operations the database has processed for a given object.
* The Oracle SQL optimizer has always been ignorant of the implied relationships between data columns within the same table. While the optimizer has traditionally analyzed the distribution of values within a column, he does not collect value-based relationships between columns.
* Creating extended statistics
Here are the steps to create extended statistics for related table columns withdbms_stats.created_extended_stats:
1 - The first step is to create column histograms for the related columns.
2 - Next, we run dbms_stats.create_extended_stats to relate the columns together.
Unlike a traditional procedure that is invoked via an execute ("exec") statement, Oracle extended statistics are created via a select statement.

NEW QUESTION: 3

SQL > ALTER SYSTEM SET STATISTICS_LEVEL = ALL SID = '*' SCOPE = SPFILE;

A. Option C
B. Option B
C. Option D
D. Option A
Answer: D
Explanation:
Explanation
http://docs.oracle.com/database/121/ADMIN/cdb_pdb_admin.htm#ADMIN14017

NEW QUESTION: 4
Which of the following IP addresses are valid Class B host addresses if a default Class B mask is in use? (Choose two.)
A. 133.6.5.4
B. 10.6.8.35
C. 127.0.0.1
D. 192.168.5.9
E. 190.6.5.4
Answer: A,E
Explanation:
The IP addresses 133.6.5.4 and 190.6.5.4 are both valid Class B addresses when a default mask is in use. The Class B default mask is 255.255.0.0 and the range of valid addresses is 128.0.0.0
191.255.255.255.
The IP address 10.6.8.35 is a Class A address. The Class A default mask is 255.0.0.0 and
the range of valid addresses is 1.0.0.0 - 127.255.255.255, with the exception of the range
127.0.0.1 - 127.255.255.255, which is reserved and cannot be assigned.
The IP address 192.168.5.9 is a Class C address. The Class C default mask is
255.255.255.0 and the range of valid addresses is 192.0.0.0 - 223.255.255.255.
The IP address 127.0.0.1 is a Class A address, but it comes from a reserved portion that
cannot be assigned.
The range 127.0.0.1 - 127.255.255.255 is used for diagnostics, and although any address
in the range will work as a diagnostic address, 127.0.0.1 is known as the loopback address.
If you can ping this address, or any address in the 127.0.0.1 - 127.255.255.255 range, then
the NIC is working and TCP/IP is installed. The Class A default mask is 255.0.0.0 and the range of valid addresses is 1.0.0.0 - 127.255.255.255, with the exception of the range
127.0.0.1 - 127.255.255.255, which is reserved and cannot be assigned.