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NEW QUESTION: 1
You are the business analyst for your organization and are preparing to complete the allocate requirements process. This process assigns stakeholder and solution requirements to solution components and to releases. One of the elements of this process is solution components. All of the following are solution components except for which one?
A. Software applications and application components used in the solution
B. Business processes to be performed and managed
C. Business policies and business rules
D. Assessment of proposed solution
Answer: D
NEW QUESTION: 2
Jeff, a customer, has a wireless network and has reported that the network traffic from the wireless access
points seems high compared to the limited number of wireless devices used. Jeff believes that other non-
employees are using the wireless network to access the Internet. Which of the following could be used to
limit the access to the wireless network? (Select TWO).
A. Changing wireless channels
B. SSID disable
C. WPA encryption
D. MAC filtering
E. Changing wireless speed standards
Answer: C,D
Explanation:
Explanation/Reference:
Explanation:
NEW QUESTION: 3
Unicast Reverse Path Forwarding can perform all of these actions except which one?
A. examine all packets received to make sure that the source addresses and source interfaces appear in the routing table and match the interfaces where the packets were received
B. inspect IP packets encapsulated in tunnels, such as GRE
C. check to see if any packet received at a router interface arrives on the best return path
D. combine with a configured ACL
E. log its events, if you specify the logging options for the ACL entries used by the unicast rpf command
Answer: B
Explanation:
For RPF to function, CEF must be enabled on the router. This is because the router uses the Forwarding Information Base (FIB) of CEF to perform the lookup process, which is built from the router's routing table. In other words, RPF does not really look at the router's routing table; instead, it uses the CEF FIB to determine spoofing. Also, RPF cannot detect all spoofed packets. For the network in this example, the perimeter router cannot determine spoofing from packets received on the external E1 interface if they match the default route statement. Therefore, the more routes your router has in its CEF FIB table, the more likely the router will be capable of detecting spoofing attacks. In addition, RPF cannot detect any spoofed packets that are encapsulated, such as packets encapsulated in GRE, IPSec, L2TP, and other packets. Network administrators can use Unicast Reverse Path Forwarding (Unicast RPF) to help limit the malicious traffic on an enterprise network. This security feature works by enabling a router to verify the reachability of the source address in packets being forwarded. This capability can limit the appearance of spoofed addresses on a network. If the source IP address is not valid, the packet is discarded. Unicast RPF works in one of three different modes: strict mode, loose mode, or VRF mode. Note that not all network devices support all three modes of operation. Unicast RPF in VRF mode will not be covered in this document. When administrators use Unicast RPF in strict mode, the packet must be received on the interface that the router would use to forward the return packet. Unicast RPF configured in strict mode may drop legitimate traffic that is received on an interface that was not the router's choice for sending return traffic. Dropping this legitimate traffic could occur when asymmetric routing paths are present in the network. When administrators use Unicast RPF in loose mode, the source address must appear in the routing table. Administrators can change this behavior using the allow-default option, which allows the use of the default route in the source verification process. Additionally, a packet that contains a source address for which the return route points to the Null 0 interface will be dropped. An access list may also be specified that permits or denies certain source addresses in Unicast RPF loose mode. Care must be taken to ensure that the appropriate Unicast RPF mode (loose or strict) is configured during the deployment of this feature because it can drop legitimate traffic. Although asymmetric traffic flows may be of concern when deploying this feature, Unicast RPF loose mode is a scalable option for networks that contain asymmetric routing paths. Unicast RPF in an Enterprise Network In many enterprise environments, it is necessary to use a combination of strict mode and loose mode Unicast RPF. The choice of the Unicast RPF mode
that will be used will depend on the design of the network segment connected to the interface on which Unicast RPF is deployed. Administrators should use Unicast RPF in strict mode on network interfaces for which all packets received on an interface are guaranteed to originate from the subnet assigned to the interface. A subnet composed of end stations or network resources fulfills this requirement. Such a design would be in place for an access layer network or a branch office where there is only one path into and out of the branch network. No other traffic originating from the subnet is allowed and no other routes are available past the subnet. Unicast RPF loose mode can be used on an uplink network interface that has a default route associated with it.
Reference http://www.cisco.com/web/about/security/intelligence/unicast-rpf.html