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NEW QUESTION: 1
CORRECT TEXT
What is considered a class IA Sodium Channel Blocker?
Answer:
Explanation:
Aminodarone and Propafenone

NEW QUESTION: 2
次のテーブル構造を持つEMPLOYEESというテーブルを所有しています。
EMPLOYEE_ID NUMBER主キー
FIRST_NAME VARCHAR2（25）
LAST_NAME VARCHAR2（25）
HIRE_DATE DATE
このDELETEステートメントを実行するとどうなりますか？
従業員を削除します。
A. 主キー違反のため、エラーが発生します。
B. EMPLOYEESテーブルのデータと構造が削除されます。
C. EMPLOYEESテーブルのデータは削除されますが、構造は削除されません。
D. ステートメントが構文的に正しくないため、エラーが発生します。
Answer: C
Explanation:
You can remove existing rows from a table by using the DELETE statement.
DELETE [FROM] table
[WHERE. condition];
Incorrect answer:
A. Statement will not cause error
B. Delete statement will not delete the table structure
D. Statement will not cause error
Refer: Introduction to Oracle9i: SQL, Oracle University Study Guide, 8-19

NEW QUESTION: 3
Which of the following protocols is vulnerable to man-in-the-middle attacks by NOT using end to end TLS encryption?
A. WPA
B. WPA 2
C. HTTPS
D. WEP
Answer: D
Explanation:
WEP offers no end-to-end TLS encryption.
The WEP process consists of a series of steps as follows:
The wireless client sends an authentication request.
The Access Point (AP) sends an authentication response containing clear-text (uh-oh!) challenge text.
The client takes the challenge text received and encrypts it using a static WEP key.
The client sends the encrypted authentication packet to the AP.
The AP encrypts the challenge text using its own static WEP key and compares the result to the authentication packet sent by the client. If the results match, the AP begins the association process for the wireless client.
The big issue with WEP is the fact that it is very susceptible to a Man in the Middle attack. The attacker captures the clear-text challenge and then the authentication packet reply. The attacker then reverses the RC4 encryption in order to derive the static WEP key. Yikes!
As you might guess, the designers attempted to strengthen WEP using the approach of key lengths. The native
Windows client supported a 104-bit key as opposed to the initial 40-bit key. The fundamental weaknesses in the WEP process still remained however.
Incorrect Answers:
A. HTTPS (HTTP over SSL or HTTP Secure) is the use of Secure Socket Layer (SSL) or Transport Layer Security (TLS) as a sublayer under regular HTTP application layering. HTTPS encrypts and decrypts user page requests as well as the pages that are returned by the Web server. The use of HTTPS protects against eavesdropping and man-in-the-middle attacks.
C. WPA (WiFi Protected Access) is the new security standard adopted by the WiFi Alliance consortium. WiFi compliance ensures interoperability between different manufacturer's wireless equipment. WPA is a much improved encryption standard that delivers a level of security beyond anything that WEP can offer. It bridges the gap between
WEP and 802.11i (WPA2) networks. WPA uses Temporal Key Integrity Protocol (TKIP), which is designed to allow WEP to be upgraded through corrective measures that address the existing security problems. WPA is able to achieve over
500 trillion possible key combinations and re-keying of global encryption keys is required. The encryption key is changed after every frame using TKIP. This allows key changes to occur on a frame by frame basis and to be automatically synchronized between the access point and the wireless client. The TKIP encryption algorithm is stronger than the one used by WEP. WPA is compatible with many older access points and network cards.
WPA uses TKIP to provide TLS encryption.
D. WPA2 is the latest implementation of WPA and provides stronger data protection and network access control. It provides WiFi users with a higher level of assurance that only authorized users can access their wireless networks.
WPA2 is based on the IEEE 802.11i standard and provides government grade security. 802.11i describes the encrypted transmission of data between systems of 802.11a and 802.11b wireless LANs. It defines new encryption key protocols including the Temporal Key Integrity Protocol (TKIP) and Advanced Encryption Standard (AES).
WPA2 uses TKIP or AES to provide TLS encryption.
References:
http://blog.ine.com/2010/10/16/wlan-security-wep/
http://searchsoftwarequality.techtarget.com/definition/HTTPS
http://www.onlinecomputertips.com/networking/wep_wpa.html

NEW QUESTION: 4
회사는 Amazon SQS 및 AWS Lambda를 사용하여 AWS에서 주문 시스템을 실행하며 각 주문은 JSON 메시지로 수신됩니다. 최근에 회사는 주문이 10 배 증가한 마케팅 이벤트를 가졌습니다. 이 증가와 함께 주문 시스템에서 다음과 같은 원치 않는 동작이 시작되었습니다.

주문을 처리하는 동안 Lambda가 실패하면 대기열 백 로그가 발생합니다.

동일한 주문이 여러 번 처리되었습니다.
솔루션 설계자는 주문 시스템의 기존 문제를 해결하고 다음과 같은 탄력성 기능을 추가하도록 요청 받았습니다.

분석을 위해 문제가있는 주문을 유지합니다.

오류가 임계 값을 초과하면 알림을 보냅니다.
Solutions Architect는 이러한 요구 사항을 어떻게 충족해야 합니까?
A. Lambda 호출마다 단일 메시지 수신, 추가 Lambda 작업자를 추가하여 대기열 폴링, 처리 후 메시지 삭제, 메시지에 대한 메시지 타이머 증가, 처리 할 수 없는 메시지에 Amazon CloudWatch Logs 사용, CloudWatch 경보 생성 Lambda 오류에 대한 알림.
B. 각 Lambda 호출에서 여러 메시지 수신, 메시지 처리 코드에 오류 처리 추가 및 처리 후 메시지 삭제, 메시지의 가시성 제한 시간 증가, 처리 할 수없는 메시지에 대한 배달 못한 편지 대기열 생성, Amazon CloudWatch 생성 알림을 위해 Lambda 오류에 대한 경보.
C. 각 Lambda 호출에서 여러 메시지 수신, 메시지 처리 코드에 오류 처리 추가 및 처리 후 메시지 삭제, 메시지의 가시성 제한 시간 증가, 처리 할 수없는 메시지에 대한 지연 대기열 생성, Amazon CloudWatch 지표 생성 Lambda 오류에 대한 알림.
D. Lambda 호출마다 여러 메시지 수신, 메시지 수신시 긴 폴링 사용, Amazon CloudWatch Logs를 사용하여 메시지 처리 코드에서 오류 기록, AWS Lambda로 배달 못한 편지 대기열 생성, 실패한 호출 캡처, CloudWatch 이벤트 생성 알림에 대한 Lambda 오류.
Answer: C