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NEW QUESTION: 1
AWS IAMのアクセス許可は2つの方法で割り当てることができます。
A. IDベースまたはリソースベースとして。
B. セキュリティグループベースまたはキーベースとして。
C. ユーザーベースまたはキーベースとして。
D. 役割ベースまたはリソースベースとして。
Answer: A
Explanation:
Permissions can be assigned in two ways: as identity-based or as resource-based. . Identity- based, or IAM permissions are attached to an IAM user, group, or role and let you specify what that user, group, or role can do. For example, you can assign permissions to the IAM user named Bob, stating that he has permission to use the Amazon Elastic Compute Cloud (Amazon EC2) RunInstances action and that he has permission to get items from an Amazon DynamoDB table named MyCompany. The user Bob might also be granted access to manage his own IAM security credentials. Identity-based permissions can be managed or inline. . Resource-based permissions are attached to a resource. You can specify resource-based permissions for Amazon S3 buckets, Amazon Glacier vaults, Amazon SNS topics, Amazon SQS queues, and AWS Key Management Service encryption keys. Resource-based permissions let you specify who has access to the resource and what actions they can perform on it. Resource-based policies are inline only, not managed.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/access_permissions.html
NEW QUESTION: 2
Which two advantages does CoPP have over receive path ACLs? (Choose two.)
A. A single instance of CoPP can be applied to all packets to the router, while rACLs require multiple instances.
B. Only CoPP can rate-limit packets.
C. Only CoPP applies to IP packets and non-IP packets.
D. Only CoPP applies to receive destination IP packets.
Answer: B,C
NEW QUESTION: 3
情報セキュリティプログラムの成功にとって最も重要なものは次のうちどれですか？
A. 情報セキュリティに対するユーザーの説明責任
B. 情報セキュリティに対する経営陣の取り組み
C. 統合ビジネスと情報セキュリティ
D. 情報セキュリティとIT目標の整合
Answer: B
NEW QUESTION: 4
From which of the following attacks can Message Authentication Code (MAC) shield your network?
A. SYN floods
B. DoS
C. spoofing
D. DDoS
Answer: C
Explanation:
Message Authentication Code (MAC) can shield your network from spoofing attacks. Spoofing, also known as
masquerading, is a popular trick in which an attacker intercepts a network packet, replaces the source address of the
packets header with the address of the authorized host, and reinserts fake information which is sent to the receiver.
This type of attack involves modifying packet contents. MAC can prevent this type of attack and ensure data integrity
by ensuring that no data has changed. MAC also protects against frequency analysis, sequence manipulation, and
ciphertext-only attacks.
MAC is a secure message digest that requires a secret key shared by the sender and receiver, making it impossible for
sniffers to change both the data and the MAC as the receiver can detect the changes.
A denial-of-service (DoS) attack floods the target system with unwanted requests, causing the loss of service to users.
One form of this attack generates a flood of packets requesting a TCP connection with the target, tying up all
resources and making the target unable to service other requests. MAC does not prevent DoS attacks. Stateful packet
filtering is the most common defense against a DoS attack.
A Distributed Denial of Service attack (DDoS) occurs when multiple systems are used to flood the network and tax the
resources of the target system. Various intrusion detection systems, utilizing stateful packet filtering, can protect
against DDoS attacks.
In a SYN flood attack, the attacker floods the target with spoofed IP packets and causes it to either freeze or crash. A
SYN flood attack is a type of denial of service attack that exploits the buffers of a device that accept incoming
connections and therefore cannot be prevented by MAC. Common defenses against a SYN flood attack include
filtering, reducing the SYN-RECEIVED timer, and implementing SYN cache or SYN cookies.
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