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2021 Aug 4A0-100 exam question
Q71. Which of the following describes the normal sequence of events in the forming of an OSPF adjacency?
A. Hello exchange, DB descriptor exchange, Link state requests and updates.
B. DB descriptor exchange, Link state requests and updates, Hello exchange.
C. Link state requests and updates, Hello exchange, DB descriptor exchange.
D. Hello exchange, Link state requests and updates, DB descriptor exchange.
Answer: A
Q72. Which of the following best describes the operation of the Media Dependent Adapter (MDA)?
A. The MDA contains the flexible fast path complex used for forwarding data.
B. Excess data is discarded by the MDA and the remaining data forwarded for QoS processing.
C. The MDA buffers data and applies Quality of Service (QoS) to classify and treat the data appropriately.
D. The MDA converts data from its incoming physical format into an internal format and provides some minimal buffering.
Answer: D
Q73. Which statement best describes how the internet evolved?
A. The internet emerged in the commercial world in the 1980’s following the US military’s adoption of TCP/IP in 1983.
B. The internet evolved from a military to a research to a commercial based network.
C. The internet remained primarily a research based network and was only commercially adopted in 2000 when the world wide web was conceived.
D. Internet service providers provided the services necessary for military based networks to evolve into research and education based networks.
Answer: B
Q74. What is the purpose of a broadcast address?
A. Provides an address that refers to all the devices in a given network.
B. Provides an address that refers to a specific group of devices in a given network.
C. Provides an address that refers to a group of devices with the same IP addresses in different Layer 2
D. Provides an address that refers to a single device on a given network.
Answer: B
Q75. What is the sequence of messages sent by a host when it attempts to ping a destination for which it has no Address Resolution Protocol (ARP) cache entry?
A. ICMP echo request, ARP request, ARP reply, ICMP echo reply.
B. ARP request, ARP reply, ICMP echo request, ICMP echo reply.
C. ICMP echo request, ICMP echo reply, ARP request, ARP reply.
D. ICMP echo request, ARP reply, ARP request, ICMP echo reply.
Answer: B
Renewal 4A0-100 dumps:
Q76. What are the tasks of the Routing Table Manager (RTM)? Choose two
A. RTM selects the best route from among multiple routing protocols.
B. RTM selects the best route using the metric as criteria
C. RTM sends its best route to all its directly connected neighbors.
D. RTM installs its best route in the routing table.
Answer: A,D
Q77. In what type of network is a broadcast storm likely to occur?
A. An Ethernet network with redundant paths not running STP.
B. An ATM network.
C. A SONET network.
D. All of the above.
Answer: A
Q78. Host A is transmitting data to host B on a TCP connection. What is the purpose of the ACK sent by host B?
A. The ACK tells the host A that host B wishes to establish a session.
B. The ACK tells host A the sequence number of the segment that was just received by host B.
C. The ACK tells host A the sequence number of the next segment that host B expects to see.
D. The ACK is flow control from host B and tells host A to reduce its transmission rate.
Answer: C
Q79. Which field in the Routing Information Base (RIB) determines the direction frames will egress the node?
A. Preference
B. Metric
C. Dest prefix
D. Next-hop
E. Cost
Answer: D
122. Which of the following is a characteristic of a static route?
A. Responds in real time to network failures.
B. Can only be used for routing within an autonomous system.
C. Uses a hop-count metric to determine the best route to a network.
D. Explicitly defines the next-hop based on operator input.
Answer: D
Q80. Which of the following describes a static default route?
A. A routing entry, included in the RIB by default, that forwards packets with an unknown destination to the CPM for inspection.
B. A manual entry used when the destination address of a network is not specifically listed in the routing table.
C. A manual entry that matches a specific /32 host address using the least cost to the destination.
D. A default entry in the FIB used when forwarding multicast and broadcast packets.
Answer: B