Monday, 8 October 2018

Cisco 400-201 Question Answer

What is NETCONF?

A. It is a standard for installing, manipulating and deleting configuration of network devices.
B. It is a Cisco proprietary solution to help remove the time, cost and manual steps involved in network element configuration.
C. It is data modeling language, to help remove the time, cost and manual steps involved in network element configuration.
D. It is a new recommendation which writes device specific CLI scripts while keeping flexibility in a vendor dependence environment.

Answer: A



DRAG DROP

Drag and drop Evolved Packet Core functional entities on the left to the description on the right.
Select and Place:



 Answer:


Friday, 2 March 2018

MWC 2018: Cisco and Vodafone Demonstrate Network Slicing


At Mobile World Congress in Barcelona, ​​network provider Cisco and mobile operator Vodafone demonstrated network cutting techniques using segment routing.


Cisco and Vodafone came together at the Mobile World Congress (MWC) in Barcelona to demonstrate new network segmentation techniques through segment routing, which is expected to be a vital component of future mobile network operators' 5G mobile networks (MNO)

It is expected that network traffic from mobile and wireless devices represents more than 60% of the total Internet Protocol (IP) traffic and that the number of devices in operation exceeds three times the world population by 2021, according to the most visual version of Cisco. Forecast of the network index: the growth in the demand for bandwidth and capacity will far exceed the demands that are currently made on the networks.

Network cutting through segment routing will come into play as a technique to help reduce and control latency for high-bandwidth applications such as video, games or augmented and virtual reality (AR and VR), which runs on networks mobile, improving customer service experience, hence the interest of Vodafone.

The operator has already started using segment routing technology to simplify its transport network operations by automating core functions to address congestion problems in its current 4G networks.

"Vodafone is very advanced in its network transformation journey," said Yvette Kanouff, senior vice president and general manager of Cisco's service provider business.

"Segment routing marks another example of how Vodafone is transforming its network operations with more software and technology in the cloud to offer innovative services more quickly and efficiently.

"Demonstrating this technology in front of the live audience here this week gives us the opportunity to share the surprise factor of how together, we are changing the face of the network."

Basically, segment routing is an IP traffic routing protocol that allows the transport layer to differentiate the way it delivers different applications, eliminating or bypassing legacy protocols, to facilitate network operations.

By deploying software-defined network (SDN) technology within the transport network, network administrators can create a low-latency "segment" (a virtual route through the transport layer) that guarantees the chosen types of traffic. , like video in consumer networks. perhaps automatic vehicle data or critical healthcare applications: they will always have an unhindered journey with the shortest end-to-end latency.

Cisco said segment routing should also bring improvements to the resilience of the network, using self-healing techniques to intuitively restore connectivity in less than 50 milliseconds if a problem occurs automatically redirecting traffic. This will provide better network uptime and allow faster updates.

Tuesday, 2 January 2018

Cisco 400-201 Question Answer

An engineer wants to configure MPLS TE Fast Reroute with link protection on five routers. Which methodology can reduce configuration on the point of the local repair router and successfully complete the task?

A. Configure a backup tunnel on the PLR.
B. Enable the autotunnel backup feature.
C. Configure a backup tunnel on the tunnel head end router.
D. Enable the autotunnel primary feature.

Answer: B



Refer to the exhibit. An MPLS Layer 3 VPN service has been provisioned for a customer. What will be the ToS value at Site-B for the exceeded traffic that it is sent from Site-A with ToS 2?


A. 0
B. 2
C. 3
D. 4
E. No exceeded traffic will reach Site-B.

Answer: E

Thursday, 14 September 2017

Cisco 400-201 Question Answer



ABC and XYZ MPLS VPN customers are accruing Internet access. Both CEs are sending traffic to the Internet. Which statement about their connectivity is true?

A. Both CEs will have connectivity.
B. Only CE-XYZ will have connectivity.
C. Neither CEs will have connectivity, as both CEs are using the same NATed subnet.
D. Only CE-ABC will have connectivity.
E. Neither CEs will have connectivity, as IAR does not have route back to the NATed subnet.

Answer: D



Drag and drop the IOS XR NTP access group options on the left to the right from the least restrictive (top) to the most restrictive order (bottom).


Answer:


Tuesday, 2 May 2017

Cisco 400-201 Question Answer

In an MPLS VPN environment, the QoS marking over the MPLS backbone must be different from the one that is received from the customer. The forwarding on the egress PE is based on the marking that is set by the ingress PE. Which null label and QoS mode can achieve this?

A. MPLS explicit null with pipe mode
B. MPLS implicit null with short pipe mode
C. MPLS implicit null with uniform mode
D. MPLS explicit null with uniform mode
E. MPLS explicit null with short pipe mode
F. MPLS implicit null with pipe mode

Answer: A

An engineer is deploying RTBH. What is necessary routing constraint required for successful implementation?


A. The trigger device must have an iBGP session with all the clusters/route reflectors in the autonomous system.
B. The trigger device must redistribute the static route pointing to a null interface into the IGP process.
C. The no ip reachables command must be issued on the PE router interface under attack.
D. The attacker's destination IP address must be routed to a null interface.
E. The eBGP sessions need to set the next-hop attribute value to the trigger device loopback interface.

Answer: A