You have just received a major threshold alert from your performance management system for two
of the three core routers. The alert states that “Link utilization between these two core routers has
exceeded 80% threshold mark.” Which three alarms or notifications should you look for in the fault
management system to help isolate the problem? (Choose three.)

Which three features are used to mitigate or protect DoS attacks that are targeted at a router?
(Choose three.)

A Tier 2 ISP network provides Internet connectivity to residential and business customers. The
Tier 2 ISP uses Internet transit service from Tier 1 ISPs at different locations. Lately, the link
utilization on a few core links of the Tier 2 ISP has increased to unacceptable levels, while a
significant part of the core network has low utilization. Which two of the following methods should
be used to alleviate this problem without deploying additional links? (Choose two.)

An ISP is concerned about DoS attacks that tend to starve out legitimate flows by generating
malicious traffic. A number of techniques are being considered for the network edge. What are
three correct statements regarding preventive measures against DoS attacks? (Choose three.)

You are employed in a service provider NOC as a Tier 3 NOC engineer. The company has
decided to expand its business services that it currently offers to customers. The new service
involves Software as a Service. You have reviewed the rollout plan that was provided by
engineering to the NOC. Because this service is new to the industry, the NOC support staff does
not have the necessary background. You, however, are well-versed in the technology.
Which two actions should you take? (Choose two.)

The service provider that you work for decided to offer its business customers a new, hosted
unified communications service. This service will allow the service provider to maintain in its data
centers all the call managers and related hardware and software so that businesses can outsource
this function to your company. Engineering has crafted a rollout plan for this new service. From the
NOC support perspective, what are the three main considerations to take into account to support
the new service? (Choose three.)

You have just launched video over IP service in the San Francisco market. A big football game will
be telecast live over the new IP network. To proactively monitor the service and improve customer
satisfaction, your task is to identify and baseline relevant network characteristics before the actual
event. Which three characteristics should you choose? (Choose three.)

The service provider that you work for will offer a hosted unified communications service. This
service will allow the service provider to maintain in its data centers all the call managers and
related hardware and software so that businesses can outsource this communication function to
your company. Engineering has created a generic migration plan that the NOC can use to move
the existing premises-based voice service of the business customer to the service provider-hosted
service. What are the two unique considerations that the NOC must take into account before
moving an existing customer service to the service provider-hosted service? (Choose two.)

Refer to the exhibit.

The network diagram shows a video service provider. The IPTV video source is connected to R1,
whereas the clients are connected to R6. Traffic flows from R1 to R6 both as unicast as well as
multicast. Unicast traffic load is greater than multicast by several orders of magnitude. There are
two paths from R1 to R6, each of them traverses through the R3 router. The path R1-R2-R3-R6
has a lower OSPF cost path compared to R1-R5-R4-R3-R6. The service provider took into
account several design criteria and implemented TE tunnels with forwarding adjacency between
R1 and R3 both from the perspective of load sharing as well as for fast reroute. Bringing up TE
tunnels had the affect of dropping multicast traffic at the R3 router. On troubleshooting the issue,
you noticed that the OSPF route to the source of multicast traffic was being learned over the TE
tunnel, and this has caused the RPF check to fail.
Considering this problem, what are two solutions to prevent multicast traffic from being affected by
the RPF check failing due to the TE tunnel? (Choose two.)

Refer to the exhibit.

The exhibit shows a core network with four core routers (one per site). All core links are 10 Gigabit
Ethernet. The IGP cost metric is the same for all core links. Which two statements regarding this
network are correct? (Choose two.)