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NEW QUESTION: 1
Refer to the topology diagram shown in the exhibit and the partial configurations shown below.

Once the attack from 209.165.201.144/28 to 209.165.202.128/28 has been detected, which additional configurations are required on the P1 IOS-XR router to implement source-based remote-triggered black hole filtering?
!
router bgp 123
address-family ipv4 unicast
redistribute static route-policy test
!
A. router static
address-family ipv4 unicast
209.165.202.128/28 null0 tag 666
192.0.2.1/32 null0 tag 667
!
route-policy test
if tag is 666 then
set next-hop 192.0.2.1
endif
if tag is 667 then
set community (no-export)
endif
end-policy
!
B. router static
address-family ipv4 unicast
209.165.202.128/28 null0 tag 666
192.0.2.1/32 null0
!
route-policy test
if tag is 666 then
set next-hop 192.0.2.1
set community (no-export)
endif
end-policy
!
C. router static
address-family ipv4 unicast
209.165.201.144/28 null0 tag 666
192.0.2.1/32 null0 tag 667
!
route-policy test
if tag is 666 then
set next-hop 192.0.2.1
endif
if tag is 667 then
set community (no-export)
endif
end-policy
!
D. router static
address-family ipv4 unicast
209.165.201.144/28 null0 tag 666
192.0.2.1/32 null0
!
route-policy test
if tag is 666 then
set next-hop 192.0.2.1
set community (no-export)
endif
end-policy
Answer: D
Explanation:
Explanation/Reference:
Source-Based RTBH Filtering
With destination-based black holing, all traffic to a specific destination is dropped after the black hole has been activated, regardless of where it is coming from. Obviously, this could include legitimate traffic destined for the target. Source-based black holes provide the ability to drop traffic at the network edge based on a specific source address or range of source addresses.
If the source address (or range of addresses) of the attack can be identified (spoofed or not), it would be better to drop all traffic at the edge based on the source address, regardless of the destination address.
This would permit legitimate traffic from other sources to reach the target. Implementation of source-based black hole filtering depends on Unicast Reverse Path Forwarding (uRPF), most often loose mode uRPF.
Loose mode uRPF checks the packet and forwards it if there is a route entry for the source IP of the incoming packet in the router forwarding information base (FIB). If the router does not have an FIB entry for the source IP address, or if the entry points to a null interface, the Reverse Path Forwarding (RPF) check fails and the packet is dropped, as shown in Figure 2. Because uRPF validates a source IP address against its FIB entry, dropping traffic from specific source addresses is accomplished by configuring loose mode uRPF on the external interface and ensuring the RPF check fails by inserting a route to the source with a next hop of Null0. This can be done by using a trigger device to send IBGP updates. These updates set the next hop for the source IP to an unused IP address that has a static entry at the edge, setting it to null as shown in Figure 2.

NEW QUESTION: 2
Which of the following refers to the maximum amount of data that can be lost due to a system failure?
A. MTIR
B. RPO
C. RTO
D. MTBF
Answer: B

NEW QUESTION: 3
Which characteristic is a potential security weakness of a traditional stateful firewall?
A. It has low performance due to the use of syn-cookies.
B. It cannot ensure each TCP connection follows a legitimate TCP three-way handshake.
C. It works only in promiscuous mode.
D. It cannot support UDP flows.
E. It cannot detect application-layer attacks.
F. The status of TCP sessions is retained in the state table after the sessions terminate.
Answer: E
Explanation:
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5708/ps5710/ps1018/product_implementati on_design_guide09186a00800fd670.html Cisco IOS Firewall consists of several major subsystems:
Stateful Packet Inspection provides a granular firewall engine
Authentication Proxy offers a per-host access control mechanism
Application Inspection features add protocol conformance checking and network use policy control Enhancements to these features extend these capabilities to VRF instances to support multiple virtual routers per device, and to Cisco Integrated Route-Bridging features to allow greater
deployment flexibility, reduce implementation timelines, and ease requirements to add security to existing networks.

NEW QUESTION: 4
Click on the Exhibit Button to view the Formula Sheet. It is up to the vendors of electronic dealing platforms to ensure that dealers are trained to use their systems.
A. Management, dealers and vendors share responsibili
B. Dealers are required to pass the ACI Dealing Certi
C. Given the wide range of electronic dealing platfor
D. Management should ensure dealers fully understand
Answer: D