[Free] 2018(June) Dumps4cert CompTIA RC0-C02 Dumps with VCE and PDF Download 11-20

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CompTIA Advanced Security Practitioner (CASP) Recertification Exam for Continuing Education

Question No: 11 – (Topic 1)

An application present on the majority of an organization’s 1,000 systems is vulnerable to a buffer overflow attack. Which of the following is the MOST comprehensive way to resolve the issue?

  1. Deploy custom HIPS signatures to detect and block the attacks.

  2. Validate and deploy the appropriate patch.

  3. Run the application in terminal services to reduce the threat landscape.

  4. Deploy custom NIPS signatures to detect and block the attacks.

Answer: B Explanation:

If an application has a known issue (such as susceptibility to buffer overflow attacks) and a patch is released to resolve the specific issue, then the best solution is always to deploy the patch.

A buffer overflow occurs when a program or process tries to store more data in a buffer (temporary data storage area) than it was intended to hold. Since buffers are created to contain a finite amount of data, the extra information – which has to go somewhere – can overflow into adjacent buffers, corrupting or overwriting the valid data held in them.

Although it may occur accidentally through programming error, buffer overflow is an increasingly common type of security attack on data integrity. In buffer overflow attacks, the extra data may contain codes designed to trigger specific actions, in effect sending new instructions to the attacked computer that could, for example, damage the user#39;s files, change data, or disclose confidential information. Buffer overflow attacks are said to have arisen because the C programming language supplied the framework, and poor programming practices supplied the vulnerability.

Question No: 12 – (Topic 1)

Which of the following represents important technical controls for securing a SAN storage infrastructure? (Select TWO).

  1. Synchronous copy of data

  2. RAID configuration

  3. Data de-duplication

  4. Storage pool space allocation

  5. Port scanning

  6. LUN masking/mapping

  7. Port mapping

Answer: F,G Explanation:

A logical unit number (LUN) is a unique identifier that designates individual hard disk

devices or grouped devices for address by a protocol associated with a SCSI, iSCSI, Fibre Channel (FC) or similar interface. LUNs are central to the management of block storage arrays shared over a storage area network (SAN).

LUN masking subdivides access to a given port. Then, even if several LUNs are accessed through the same port, the server masks can be set to limit each server#39;s access to the appropriate LUNs. LUN masking is typically conducted at the host bus adapter (HBA) or switch level.

Port mapping is used in ‘Zoning’. In storage networking, Fibre Channel zoning is the partitioning of a Fibre Channel fabric into smaller subsets to restrict interference, add security, and to simplify management. While a SAN makes available several devices and/or ports to a single device, each system connected to the SAN should only be allowed access to a controlled subset of these devices/ports.

Zoning can be applied to either the switch port a device is connected to OR the WWN World Wide Name on the host being connected. As port based zoning restricts traffic flow based on the specific switch port a device is connected to, if the device is moved, it will lose access. Furthermore, if a different device is connected to the port in question, it will gain access to any resources the previous host had access to.

Question No: 13 – (Topic 1)

A data processing server uses a Linux based file system to remotely mount physical disks on a shared SAN. The server administrator reports problems related to processing of files where the file appears to be incompletely written to the disk. The network administration team has conducted a thorough review of all network infrastructure and devices and found everything running at optimal performance. Other SAN customers are unaffected. The data being processed consists of millions of small files being written to disk from a network source one file at a time. These files are then accessed by a local Java program for processing before being transferred over the network to a SELinux host for processing.

Which of the following is the MOST likely cause of the processing problem?

  1. The administrator has a PERL script running which disrupts the NIC by restarting the CRON process every 65 seconds.

  2. The Java developers accounted for network latency only for the read portion of the processing and not the write process.

  3. The virtual file system on the SAN is experiencing a race condition between the reads and writes of network files.

  4. The Linux file system in use cannot write files as fast as they can be read by the Java program resulting in the errors.

Answer: D

Question No: 14 – (Topic 1)

An enterprise must ensure that all devices that connect to its networks have been previously approved. The solution must support dual factor mutual authentication with strong identity assurance. In order to reduce costs and administrative overhead, the security architect wants to outsource identity proofing and second factor digital delivery to the third party. Which of the following solutions will address the enterprise requirements?

  1. Implementing federated network access with the third party.

  2. Using a HSM at the network perimeter to handle network device access.

  3. Using a VPN concentrator which supports dual factor via hardware tokens.

  4. Implementing 802.1x with EAP-TTLS across the infrastructure.

Answer: D Explanation:

IEEE 802.1X (also known as Dot1x) is an IEEE Standard for Port-based Network Access Control (PNAC). It is part of the IEEE 802.1 group of networking protocols. It provides an authentication mechanism to devices wishing to attach to a LAN or WLAN.

802.1X authentication involves three parties: a supplicant, an authenticator, and an authentication server. The supplicant is a client device (such as a laptop) that wishes to attach to the LAN/WLAN – though the term #39;supplicant#39; is also used interchangeably to refer to the software running on the client that provides credentials to the authenticator. The authenticator is a network device, such as an Ethernet switch or wireless access point; and the authentication server is typically a host running software supporting the RADIUS and EAP protocols.

The authenticator acts like a security guard to a protected network. The supplicant (i.e., client device) is not allowed access through the authenticator to the protected side of the network until the supplicant’s identity has been validated and authorized. An analogy to this is providing a valid visa at the airport#39;s arrival immigration before being allowed to enter the country. With 802.1X port-based authentication, the supplicant provides credentials, such as user name/password or digital certificate, to the authenticator, and the authenticator forwards the credentials to the authentication server for verification. If the authentication server determines the credentials are valid, the supplicant (client device) is allowed to access resources located on the protected side of the network.

EAP-TTLS (Tunneled Transport Layer Security) is designed to provide authentication that

is as strong as EAP-TLS, but it does not require that each user be issued a certificate. Instead, only the authentication servers are issued certificates. User authentication is performed by password, but the password credentials are transported in a securely encrypted tunnel established based upon the server certificates.

Question No: 15 – (Topic 1)

After being notified of an issue with the online shopping cart, where customers are able to arbitrarily change the price of listed items, a programmer analyzes the following piece of code used by a web based shopping cart.


The programmer found that every time a user adds an item to the cart, a temporary file is created on the web server /tmp directory. The temporary file has a name which is generated by concatenating the content of the $USERINPUT variable and a timestamp in the form of MM-DD-YYYY, (e.g. smartphone-12-25-2013.tmp) containing the price of the item being purchased. Which of the following is MOST likely being exploited to manipulate the price of a shopping cart’s items?

  1. Input validation

  2. SQL injection


  4. Session hijacking

Answer: C Explanation:

In this question, TOCTOU is being exploited to allow the user to modify the temp file that contains the price of the item.

In software development, time of check to time of use (TOCTOU) is a class of software bug caused by changes in a system between the checking of a condition (such as a security credential) and the use of the results of that check. This is one example of a race condition. A simple example is as follows: Consider a Web application that allows a user to edit pages, and also allows administrators to lock pages to prevent editing. A user requests to edit a page, getting a form which can be used to alter its content. Before the user submits the form, an administrator locks the page, which should prevent editing. However, since editing has already begun, when the user submits the form, those edits (which have already been made) are accepted. When the user began editing, the appropriate

authorization was checked, and the user was indeed allowed to edit. However, the authorization was used later, at a time when edits should no longer have been allowed. TOCTOU race conditions are most common in Unix between operations on the file system, but can occur in other contexts, including local sockets and improper use of database transactions.

Question No: 16 CORRECT TEXT – (Topic 1)

Compliance with company policy requires a quarterly review of firewall rules. A new administrator is asked to conduct this review on the internal firewall sitting between several internal networks. The intent of this firewall is to make traffic more restrictive. Given the following information answer the questions below:

User Subnet: Server Subnet: Finance Subnet:

Instructions: To perform the necessary tasks, please modify the DST port, Protocol, Action, and/or Rule Order columns. Firewall ACLs are read from the top down

Task 1) An administrator added a rule to allow their machine terminal server access to the server subnet. This rule is not working. Identify the rule and correct this issue.

Task 2) All web servers have been changed to communicate solely over SSL. Modify the appropriate rule to allow communications.

Task 3) An administrator added a rule to block access to the SQL server from anywhere on the network. This rule is not working. Identify and correct this issue.

Task 4) Other than allowing all hosts to do network time and SSL, modify a rule to ensure that no other traffic is allowed.

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Dumps4Cert 2018 PDF and VCE

Answer: Check the explanation part for complete solution below.


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Screen Shot 2015-04-09 at 10

Task 1) An administrator added a rule to allow their machine terminal server access to the server subnet. This rule is not working. Identify the rule and correct this issue.

The rule shown in the image below is the rule in question. It is not working because the action is set to Deny. This needs to be set to Permit.

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Task 2) All web servers have been changed to communicate solely over SSL. Modify the appropriate rule to allow communications.

The web servers rule is shown in the image below. Port 80 (HTTP) needs to be changed to port 443 for HTTPS (HTTP over SSL).

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Task 3) An administrator added a rule to block access to the SQL server from anywhere on the network. This rule is not working. Identify and correct this issue.

The SQL Server rule is shown in the image below. It is not working because the protocol is wrong. It should be TCP, not UDP.

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Task 4) Other than allowing all hosts to do network time and SSL, modify a rule to ensure that no other traffic is allowed.

The network time rule is shown in the image below.

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However, this rule is not being used because the ‘any’ rule shown below allows all traffic and the rule is placed above the network time rule. To block all other traffic, the ‘any’ rule needs to be set to Deny, not Permit and the rule needs to be placed below all the other rules (it needs to be placed at the bottom of the list to the rule is enumerated last).

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Question No: 17 – (Topic 1)

Company XYZ finds itself using more cloud-based business tools, and password management is becoming onerous. Security is important to the company; as a result, password replication and shared accounts are not acceptable. Which of the following implementations addresses the distributed login with centralized authentication and has wide compatibility among SaaS vendors?

  1. Establish a cloud-based authentication service that supports SAML.

  2. Implement a new Diameter authentication server with read-only attestation.

  3. Install a read-only Active Directory server in the corporate DMZ for federation.

  4. Allow external connections to the existing corporate RADIUS server.

Answer: A Explanation:

There is widespread adoption of SAML standards by SaaS vendors for single sign-on identity management, in response to customer demands for fast, simple and secure employee, customer and partner access to applications in their environments.

By eliminating all passwords and instead using digital signatures for authentication and authorization of data access, SAML has become the Gold Standard for single sign-on into cloud applications. SAML-enabled SaaS applications are easier and quicker to user provision in complex enterprise environments, are more secure and help simplify identity management across large and diverse user communities.

Security Assertion Markup Language (SAML) is an XML-based, open-standard data format for exchanging authentication and authorization data between parties, in particular, between an identity provider and a service provider.

The SAML specification defines three roles: the principal (typically a user), the Identity provider (IdP), and the service provider (SP). In the use case addressed by SAML, the principal requests a service from the service provider. The service provider requests and obtains an identity assertion from the identity provider. On the basis of this assertion, the service provider can make an access control decision – in other words it can decide whether to perform some service for the connected principal.

Question No: 18 CORRECT TEXT – (Topic 1)

Company A has noticed abnormal behavior targeting their SQL server on the network from a rogue IP address. The company uses the following internal IP address ranges: for the corporate site and for the remote site. The Telco router

interface uses the IP range.

Instructions: Click on the simulation button to refer to the Network Diagram for Company A. Click on Router 1, Router 2, and the Firewall to evaluate and configure each device.

Task 1: Display and examine the logs and status of Router 1, Router 2, and Firewall interfaces.

Task 2: Reconfigure the appropriate devices to prevent the attacks from continuing to target the SQL server and other servers on the corporate network.

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Dumps4Cert 2018 PDF and VCE

Dumps4Cert 2018 PDF and VCE

Dumps4Cert 2018 PDF and VCE

Answer: Check the explanation part for complete solution below.


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Screen Shot 2015-04-09 at 10

We have traffic coming from two rogue IP addresses: and (both in the subnet) going to IPs in the corporate site subnet ( and the remote site subnet ( We need to Deny (block) this traffic at the firewall by ticking the following two checkboxes:

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Question No: 19 – (Topic 1)

A small company is developing a new Internet-facing web application. The security requirements are:

Users of the web application must be uniquely identified and authenticated.

Users of the web application will not be added to the company’s directory services. Passwords must not be stored in the code.

Which of the following meets these requirements?

  1. Use OpenID and allow a third party to authenticate users.

  2. Use TLS with a shared client certificate for all users.

  3. Use SAML with federated directory services.

  4. Use Kerberos and browsers that support SAML.

Answer: A Explanation:

Users create accounts by selecting an OpenID identity provider, and then use those accounts to sign onto any website which accepts OpenID authentication.

OpenID is an open standard and decentralized protocol by the non-profit OpenID Foundation that allows users to be authenticated by certain co-operating sites (known as Relying Parties or RP) using a third party service. This eliminates the need for webmasters to provide their own ad hoc systems and allowing users to consolidate their digital identities. In other words, users can log into multiple unrelated websites without having to register with their information over and over again.

Several large organizations either issue or accept OpenIDs on their websites according to the OpenID Foundation: AOL, Blogger, Flickr, France Telecom, Google, Hyves, LiveJournal, Microsoft (provider name Microsoft account), Mixi, Myspace, Novell, Orange, Sears, Sun, Telecom Italia, Universal Music Group, VeriSign, WordPress, and Yahoo!.

Other providers include BBC, IBM, PayPal, and Steam.

Question No: 20 – (Topic 1)

A popular commercial virtualization platform allows for the creation of virtual hardware. To

virtual machines, this virtual hardware is indistinguishable from real hardware. By implementing virtualized TPMs, which of the following trusted system concepts can be implemented?

  1. Software-based root of trust

  2. Continuous chain of trust

  3. Chain of trust with a hardware root of trust

  4. Software-based trust anchor with no root of trust

Answer: C Explanation:

A Trusted Platform Module (TPM) is a microchip designed to provide basic security-related functions, primarily involving encryption keys. The TPM is usually installed on the motherboard of a computer, and it communicates with the remainder of the system by using a hardware bus.

A vTPM is a virtual Trusted Platform Module; a virtual instance of the TPM.

IBM extended the current TPM V1.2 command set with virtual TPM management commands that allow us to create and delete instances of TPMs. Each created instance of a TPM holds an association with a virtual machine (VM) throughout its lifetime on the platform.

The TPM is the hardware root of trust.

Chain of trust means to extend the trust boundary from the root(s) of trust, in order to extend the collection of trustworthy functions. Implies/entails transitive trust.

Therefore a virtual TPM is a chain of trust from the hardware TPM (root of trust).

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