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Security+ SY0-401 そうだったら、下記のものを読んでください。

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SY0-401 PDF DEMO:

QUESTION NO: 1
Which of the following statements is MOST likely to be included in the security awareness training about P2P?
A. P2P is always used to download copyrighted material.
B. P2P can be used to improve computer system response.
C. P2P may prevent viruses from entering the network.
D. P2P may cause excessive network bandwidth.
Answer: D
Explanation:
P2P networking by definition involves networking which will reduce available bandwidth for the rest of the users on the network.

QUESTION NO: 2
A security analyst needs to ensure all external traffic is able to access the company's front- end servers but protect all access to internal resources. Which of the following network design elements would MOST likely be recommended?
A. DMZ
B. Cloud computing
C. VLAN
D. Virtualization
Answer: A
Explanation:
A demilitarized zone (DMZ) is an area of a network that is designed specifically for public users to access. The DMZ is a buffer network between the public untrusted Internet and the private trusted
LAN. Often a DMZ is deployed through the use of a multihomed firewall.

QUESTION NO: 3
Users at a company report that a popular news website keeps taking them to a web page with derogatory content. This is an example of which of the following?
A. Evil twin
B. DNS poisoning
C. Vishing
D. Session hijacking
Answer: B
Explanation:
DNS spoofing (or DNS cache poisoning) is a computer hacking attack, whereby data is introduced into a Domain Name System (DNS) resolver's cache, causing the name server to return an incorrect IP address, diverting traffic to the attacker's computer (or any other computer).
A domain name system server translates a human-readable domain name (such as example.com) into a numerical IP address that is used to route communications between nodes. Normally if the server doesn't know a requested translation it will ask another server, and the process continues recursively. To increase performance, a server will typically remember (cache) these translations for a certain amount of time, so that, if it receives another request for the same translation, it can reply without having to ask the other server again.
When a DNS server has received a false translation and caches it for performance optimization, it is considered poisoned, and it supplies the false data to clients. If a DNS server is poisoned, it may return an incorrect IP address, diverting traffic to another computer (in this case, the server hosting the web page with derogatory content).

QUESTION NO: 4
The Chief Technology Officer (CTO) wants to improve security surrounding storage of customer passwords.
The company currently stores passwords as SHA hashes. Which of the following can the CTO implement requiring the LEAST change to existing systems?
A. Smart cards
B. TOTP
C. Key stretching
D. Asymmetric keys
Answer: A
Explanation:
Smart cards usually come in two forms. The most common takes the form of a rectangular piece of plastic with an embedded microchip. The second is as a USB token. It contains a built in processor and has the ability to securely store and process information. A "contact" smart card communicates with a PC using a smart card reader whereas a "contactless" card sends encrypted information via radio waves to the PC.
Typical scenarios in which smart cards are used include interactive logon, e-mail signing, e-mail decryption and remote access authentication. However, smart cards are programmable and can contain programs and data for many different applications. For example smart cards may be used to store medical histories for use in emergencies, to make electronic cash payments or to verify the identity of a customer to an e-retailer.
Microsoft provides two device independent APIs to insulate application developers from differences between current and future implementations: CryptoAPI and Microsoft Win32 SCard APIs.
The Cryptography API contains functions that allow applications to encrypt or digitally sign data in a flexible manner, while providing protection for the user's sensitive private key data. All cryptographic operations are performed by independent modules known as cryptographic service providers (CSPs).
There are many different cryptographic algorithms and even when implementing the same algorithm there are many choices to make about key sizes and padding for example. For this reason, CSPs are grouped into types, in which each supported CryptoAPI function, by default, performs in a way particular to that type. For example, CSPs in the PROV_DSS provider type support DSS Signatures and
MD5 and SHA hashing.

QUESTION NO: 5
Which of the following is used by the recipient of a digitally signed email to verify the identity of the sender?
A. Recipient's private key
B. Sender's public key
C. Recipient's public key
D. Sender's private key
Answer: B
Explanation:
When the sender wants to send a message to the receiver. It's important that this message not be altered. The sender uses the private key to create a digital signature. The message is, in effect, signed with the private key. The sender then sends the message to the receiver. The recipient uses the public key attached to the message to validate the digital signature. If the values match, the receiver knows the message is authentic. Thus the recipient uses the sender's public key to verify the sender's identity.

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Updated: May 27, 2022