Pass4Test can provide a shortcut for you and save you a lot of time and effort. Pass4Test will provide good training tools for your SOA Certified Professional certification S90-20A exam and help you pass SOA Certified Professional certification S90-20A exam. If you see other websites provide relevant information to the website, you can continue to look down and you will find that in fact the information is mainly derived from our Pass4Test. Our Pass4Test provide the most comprehensive information and update fastest.
SOA Certified Professional S90-20A exam is a Technical Specialist exam. SOA Certified Professional S90-20A exam can help and promote IT staff have a good career. With a good career, and of course you can create a steady stream of corporate and national interests, so as to promote the development of the national economy. If all of the IT staff can do like this the state will become stronger. Pass4Test SOA Certified Professional S90-20A exam training materials can help IT personnel to achieve this purpose. We guarantee you 100% to pass the exam. Make the tough decision to choose our Pass4Test SOA Certified Professional S90-20A exam training materials please.
Pass4Test guarantee exam success rate of 100% ratio, except no one. You choose Pass4Test, and select the training you want to start, you will get the best resources with market and reliability assurance.
On Pass4Test website you can free download part of the exam questions and answers about SOA Certified Professional certification S90-20A exam to quiz our reliability. Pass4Test's products can 100% put you onto a success away, then the pinnacle of IT is a step closer to you.
Exam Code: S90-20A
Exam Name: SOA Certified Professional (SOA Security Lab)
Many candidates who are ready to participate in the SOA Certified Professional certification S90-20A exam may see many websites available online to provide resources about SOA Certified Professional certification S90-20A exam. However, Pass4Test is the only website whose exam practice questions and answers are developed by a study of the leading IT experts's reference materials. The information of Pass4test can ensure you pass your first time to participate in the SOA Certified Professional certification S90-20A exam.
S90-20A Free Demo Download: http://www.pass4test.com/S90-20A.html
NO.1 Service Consumer A sends a request message to Service A (1) after which Service A retrieves financial
data from Database A (2). Service A then sends a request message with the retrieved data to Service B
(3). Service B exchanges messages with Service C (4) and Service D (5), which perform a series of
calculations on the data and return the results to Service A. Service A uses these results to update
Database A (7) and finally sends a response message to Service Consumer A (8). Component B has
direct, independent access to Database A and is fully trusted by Database A. Both Component B and
Database A reside within Organization A. Service Consumer A and Services A, B, C, and D are external to
the organizational boundary of Organization A.
Component B is considered a mission critical program that requires guaranteed access to and fast
response from Database A. Service A was recently the victim of a denial of service attack, which resulted
in Database A becoming unavailable for extended periods of time (which further compromised
Component B). Additionally, Services B, C, and D have repeatedly been victims of malicious intermediary
attacks, which have further destabilized the performance of Service A.
How can this architecture be improved to prevent these attacks?
A. A utility service is created to encapsulate Database A and to assume responsibility for authenticating all
access to the database by Service A and any other service consumers. Due to the mission critical
requirements of Component B, the utility service further contains logic that strictly limits the amount of
concurrent requests made to Database A from outside the organizational boundary. The Data
Confidentiality and Data Origin Authentication patterns are applied to all message exchanged within the
external service composition in order to establish message-layer security.
B. Service Consumer A generates a private/public key pair and sends this public key and identity
information to Service A. Service A generates its own private/public key pair and sends it back to Service
Consumer A. Service Consumer A uses the public key of Service A to encrypt a randomly generated
session key and then sign the encrypted session key with the private key. The encrypted, signed session
key is sent to Service A. Now, this session key can be used for secure message-layer communication
between Service Consumer A and Service A. The Service Perimeter Guard pattern is applied to establish
a perimeter service that encapsulates Database A in order to authenticate all external access requests.
C. Services B, C, and D randomly generate Session Key K, and use this key to encrypt request and
response messages with symmetric encryption. Session Key K is further encrypted itself asymmetrically.
When each service acts as a service consumer by invoking another service, it decrypts the encrypted
Session Key K and the invoked service uses the key to decrypt the encrypted response. Database A is
replicated so that only the replicated version of the database can be accessed by Service A and other
external service consumers.
D. The Direct Authentication pattern is applied so that when Service Consumer A submits security
credentials, Service A will be able to evaluate the credentials in order to authenticate the request
message. If the request message is permitted, Service A invokes the other services and accesses
Database A. Database A is replicated so that only the replicated version of the database can be accessed
by Service A and other external service consumers.
Answer: A
SOA Certified Professional S90-20A test S90-20A S90-20A S90-20A certification
NO.2 Service A exchanges messages with Service B multiple times during the same runtime service activity.
Communication between Services A and B has been secured using transport-layer security. With each
service request message sent to Service B (1A. IB), Service A includes an
X.509 certificate, signed by an external Certificate Authority (CA). Service B validates the certificate by
retrieving the public key of the CA (2A. 2B) and verifying the digital signature of the
X.509 certificate. Service B then performs a certificate revocation check against a separate external CA
repository (3A, 3B). No intermediary service agents reside between Service A and Service B.
To fulfill a new security requirement, Service A needs to be able to verify that the response message sent
by Service B has not been modified during transit. Secondly, the runtime performance between Services
A and B has been unacceptably poor and therefore must be improved without losing the ability to verify
Service A's security credentials. It has been determined that the latency is being caused by redundant
security processing carried out by Service B.
Which of the following statements describes a solution that fulfills these requirements?
A. Apply the Trusted Subsystem pattern to introduce a utility service that performs the security processing
instead of Service B. The utility service can verify the security credentials of request messages from
Service A and digitally sign messages sent to Service A to enable verification of message integrity.
Furthermore, the utility service can perform the verification of security credentials submitted by Service A
only once per runtime service activity. After the first messageexchange, it can issue a SAML token to
Service A that gets stored within the current session. Service A can then use this session-based token
with subsequent message exchange. Because SAML tokens have a very small validity period (in contrast
to X.509 certificates), there is no need to perform a revocation check with every message exchange.
B. Service B needs to be redesigned so that it performs the verification of request messages from Service
A only for the first message exchange during the runtime service activity. Thereafter, it can issue a SAML
token to Service A that gets stored within the current session. Service A then uses this session-based
token with subsequent message exchanges. Because SAML tokens have a very small validity period (in
contrast to X.509 certificates), there is no need to perform a revocation check with every message
exchange.
C. WS-SecurityPolicy transport binding assertions can be used to improve performance via
transport-layer security The use of symmetric keys can keep the encryption and decryption overhead to a
minimum, which will further reduce the latency between Service A and Service B. By encrypting the
messages, attackers cannot modify message contents, so no additional actions for integrity verification
are needed.
D. The Data Origin Authentication pattern can be applied together with the Service Perimeter Guard
pattern to establish a perimeter service that can verify incoming request messages sent to Service B and
to filter response messages sent to Service A. The repository containing the verification information about
the Certificate Authorities can be replicated in the trust domain of the perimeter service. When access is
requested by Service A, the perimeter service evaluates submitted security credentials by checking them
against the locally replicated repository. Furthermore, it can encrypt messages sent to Service A by
Service B. and attach a signed hash value.
Answer: A
SOA Certified Professional S90-20A test answers S90-20A exam prep
Are you one of them? Are you still worried and confused because of the the various exam materials and fancy training courses exam? Pass4Test is the right choice for you. Because we can provide you with a comprehensive exam, including questions and answers. All of these will help you to acquire a better knowledge, we are confident that you will through Pass4Test the SOA Certified Professional S90-20A certification exam. This is our guarantee to all customers.
