Refer to the exhibit. As part of a redesign project, you must predict multicast behavior. What happens to the multicast traffic received on the shared tree (*, G), if it is received on the LHR interface indicated?
Answer(s): B
Refer to the exhibit. This network is running legacy STP 802.1d. Assuming "hello_timer" is fixed to 2 seconds, which parameters can be modified to speed up convergence times after single link/node failure?
https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/19120-122.html
Company XYZ is running a redundant private WAN network using OSPF as the underlay protocol. The current design accommodates for redundancy in the network, but it is taking over 30 seconds for the network to reconverge upon failure. Which technique can be implemented in the design to detect such a failure in a subsecond?
Answer(s): E
BFD (Bidirectional Forwarding Detection) is a protocol that can be used to detect link failures in a subsecond. BFD works by sending periodic hello packets between two devices. If a device does not receive a hello packet from its neighbor within a predetermined time period, it will declare the link down.The other options are not as effective for detecting link failures in a subsecond. Option A, fate sharing, is a technique that can be used to improve the reliability of a network by ensuring that two devices share the same fate. However, fate sharing does not help to detect link failures in a subsecond. Option B, OSPF LFA, is a technique that can be used to provide loop-free alternate paths in OSPF networks. However, OSPF LFA does not help to detect link failures in a subsecond. Option C, flex links, is a technique that can be used to increase the flexibility of a network by allowing links to be used for multiple purposes. However, flex links do not help to detect link failures in a subsecond. Option D, STP, is a protocol that can be used to prevent loops in Layer 2 networks. However, STP does not help to detect link failures in a subsecond.Therefore, the best technique for detecting link failures in a subsecond in a redundant private WAN network using OSPF as the underlay protocol is BFD.Here are some additional reasons why BFD is a good choice:-BFD is a simple protocol that is easy to configure and manage.-BFD is supported by most major operating systems and network devices.-BFD can be used to detect link failures in a subsecond, which can help to improve the reliability of the network.-
Which three elements help network designers to construct secure systems that protect information and resources (such as devices, communication, and data) from unauthorized access, modification, inspection, or destruction? (Choose three.)
Answer(s): B,D,E
-Confidentiality refers to the protection of information from unauthorized access. This can be achieved through the use of encryption, access control lists, and other security measures.-Integrity refers to the protection of information from unauthorized modification. This can be achieved through the use of checksums, digital signatures, and other security measures.-Availability refers to the assurance that information and resources are available to authorized users when they need them. This can be achieved through the use of fault-tolerant systems, load balancing, and other security measures.
Which relationship between iBGP and the underlying physical topology is true?
Answer(s): A
iBGP (Interior Border Gateway Protocol) is a routing protocol that is used to exchange routing information between routers in the same autonomous system (AS). iBGP full mesh means that every router in the AS has a direct connection to every other router in the AS.A fully meshed network topology is not required for iBGP, but it is the most common way to implement iBGP full mesh. This is because a fully meshed network topology provides the best redundancy and reliability.If a network is not fully meshed, then iBGP can still be used, but it will be less reliable. This is because if a link fails, then the routers that are connected to the link will not be able to exchange routing information with each other.The other options are not correct. Option B, iBGP full mesh requirement does not dictate any specific network topology, is incorrect because iBGP full mesh requires a fully meshed network topology. Option C, iBGP does not work on a ring network topology even with an underlying IGP, is incorrect because iBGP can work on a ring network topology if the ring network topology is fully meshed. Option D, iBGP can work only on a ring network topology with a link-state protocol like OSPF or IS-IS, is incorrect because iBGP can work on any network topology, as long as the network topology is fully meshed.
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