You are the network administrator for CompanyX which operates a main office in San Diego and a newly acquired branch office in Los Angeles. The San Diego office maintains a firewall that allows only outbound web traffic and Virtual Private Network (VPN) traffic to the Internet. In front of this firewall a router is connected to a local Internet Service Provider (ISP). The San Diego office also includes an L2TP server named VPN1 with a persistent connection to the Internet. VPN1
Answer: C
A firewall blocks all requests except those on ports 80 and 443. IIOP requestsA Can be processed because IIOP always works on port 80 B Cannot be processed because port 80 belongs to a different protocol C Can be processed by SSL D Can be processed via HTTP blocking E Can be processed via HTTP tunneling
Answer: E
When would you use Tunnelling?A When you don’t have access to any spare ports of the Firewall and need to tunnel your application through an existing port. B To break out of prison. C When you do have access to spare ports of the Firewall and are able to use them. So you tunnel your application out of one of these new ports that was created just for your application. D When you are using IIOP with RMI.
Answer: A
You are working for a small to medium sized business that has just started to use servers to host J2EE Applications (its own and clients’.) However since its launch into this new area there have been three separate instances of hacks involving access of sensitive sales information. A security consultant has been brought in to assess the situation and he recommends that your company use a DMZ. What is a DMZ?A The network behind a firewall that’s protected from the Internet.
Answer: D
You are working late at the office one day when the security guard informs that you have to leave as the building is closed for the evening. As you are working on a big project you decide to continue your work at home. However when you try to connect to the application from home you get no response. You are trying to connect to your RMI-JRMP application; the port is available on the firewall, what is the most likely reason why you can’t connect?A The port on the firewall isn’t
Answer: B
You are designing an application that will use JRMP over IIOP. The Network engineers at your company would like to know what port you intend to use to access the internet and other networks so that they can make it available on the companies firewall. What port do you ask for?A 443 B 535 C 1099 D 8443 E 80
Answer: C
You are working for a company with a worldwide presence; their offices are spread across many countries and over many computer networks. Virtual private networks have been set up to increase security. What are Virtual Private Networks are where are they created? (VPNs)A A network created between two other networks (these are not located in the same place, geographically). Encryption and Authentication are used in the VPN. Normally the VPN is a network on top of an untrusted network (like
Answer: A
You are creating an architecture for an online ordering system with the following requirements: • Users will order products over the Internet. • Business objects will reside on a local application server. • All product information is stored in a local RDBMS. • Credit card information must be validated by an external system. • All local systems will be secured behind a firewall. • All communications with the external systems must be secure. Which
Answer: B, C
Which two features of a firewall might interfere with the operation of IIOP? (Choose two) A. Port filtering B. Load balancing C. Address filtering D. Network address translation
Answer: A, C
Your supply chain software currently runs a standalone application which communicates to the backend services using IIOP. The new requirements for the software are: • The client software must run as an applet. • The user’s firewall will only allow port 80 and 443 traffic through its firewall. • All the backend services will be CORBA-based. • A Web server sits in front of the COBRA services. • The backend Web server runs on port 80 and 443.
Answer: C, D
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