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The EC-Council 312-38: EC-Council Certified Network Defender (CND) exam is designed to test the knowledge and skills of professionals in the field of network defense. This certification is recognized globally and is intended for individuals who wish to validate their expertise in protecting networks against cyber threats. The EC-Council is a leading organization in the field of information security and has developed several certifications to enhance the skills of professionals in this area.
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NEW QUESTION # 158
Which of the following protocols is used for inter-domain multicast routing and natively supports "source- specific multicast" (SSM)?
Answer: B
Explanation:
BGMP stands for border gateway multicast protocol. It is used for inter-domain multicast routing and natively supports "source-specific multicast" (SSM). In order to support "any-source multicast" (ASM), BGMP builds shared trees for active multicast groups. This allows domains to build source-specific, inter-domain, distribution branches where needed. BGMP uses TCP as its transport protocol, which helps in eliminating the need to implement message fragmentation, retransmission, acknowledgement, and sequencing.
Answer option B is incorrect. The Distance Vector Multicast Routing Protocol (DVMRP) is used to share information between routers to transport IP Multicast packets among networks. It uses a reverse path-flooding technique and is used as the basis for the Internet's multicast backbone (MBONE). In particular, DVMRP is notorious for poor network scaling, resulting from reflooding, particularly with versions that do not implement pruning. DVMRP's flat unicast routing mechanism also affects its capability to scale.
Answer option D is incorrect. EIGRP is a Cisco proprietary protocol. It is an enhanced version of IGRP. It has faster convergence due to use of triggered update and saving neighbor's routing table locally. It supports VLSM and routing summarization. As EIGRP is a distance vector protocol, it automatically summarizes routes across Class A, B, and C networks. It also supports multicast and incremental updates and provides routing for three routed protocols, i.e., IP, IPX, and AppleTalk.
Answer option C is incorrect. Open Shortest Path First (OSPF) is a routing protocol that is used in large networks. Internet Engineering Task Force (IETF) designates OSPF as one of the Interior Gateway Protocols.
A host uses OSPF to obtain a change in the routing table and to immediately multicast updated information to all the other hosts in the network.
NEW QUESTION # 159
Which of the following policies to help define what users can and should do to use the network and organization of computer equipment?
Answer: D
NEW QUESTION # 160
Will is working as a Network Administrator. Management wants to maintain a backup of all the company data as soon as it starts operations. They decided to use a RAID backup storage technology for their data backup plan. To implement the RAID data backup storage, Will sets up a pair of RAID disks so that all the data written to one disk is copied automatically to the other disk as well. This maintains an additional copy of the data.
Which RAID level is used here?
Answer: D
NEW QUESTION # 161
Which of the following is the practice of sending unwanted e-mail messages, frequently with commercial content, in large quantities to an indiscriminate set of recipients? Each correct answer represents a complete solution. Choose all that apply.
Answer: A,C
NEW QUESTION # 162
Which of the following ranges of addresses can be used in the first octet of a Class B network address?
Answer: A
NEW QUESTION # 163
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