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2021 Oct 4A0-100 testing engine

Q61. 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 


Q62. If a customer requires a point-to-point layer 2 VPN service between two locations which VPN service would be typically suited for this customer? 

A. Virtual Private Wire Service . 

B. Virtual Private LAN Service. 

C. Virtual Private Routed Networks. 

D. Virtual Private Dark Fiber Service. 

Answer: A 


Q63. Kahn solved the problem of interconnecting different networks using different protocols by pioneering a new protocol called TCP that was capable of: 

A. Secure transmission of information. 

B. Enforcing a constant packet size to avoid discards. 

C. Allowing remote logins. 

D. Providing host to host connectivity with global addressing. 

Answer: D 


Q64. What is the purpose of TCP flow control? 

A. It restricts the sender from sending too much data when there is congestion in the network. 

B. It allows the receiver to control the rate at which the sender transmits data. 

C. It forces the sender to send only one segment at a time. 

D. It allows the receiver to drop segments without the sender having to retransmit. 

Answer: B 


Q65. A Class C network is defined by a: 

A. 32-bit network prefix. 

B. 24-bit network prefix. 

C. 16-bit network. 

D. 8-bit network. 

Answer: B 


Improve 4A0-100 test questions:

Q66. Which of the following Ethernet rates requires an optical cable to operate? 

A. 10 Mb/s Ethernet. 

B. 100 Mb/s Ethernet. 

C. 1000 Mb/s Ethernet . 

D. There are copper and optical versions possible for all of these Ethernet data rates. 

Answer: D 


Q67. Which of the following statements is TRUE regarding a VPWS service? 

A. VPWS is a point-to-multipoint service. 

B. VPWS requires MAC learning in order to forward frames to the correct destination 

C. A Spanning Tree Protocol must be enabled when deploying a VPWS. 

D. VPWS treats multicast traffic similar to unicast traffic. 

Answer: D 


Q68. What kind of information can a Dynamic Host Configuration Protocol (DHCP) client receive? 

A. Details of the configuration settings of each router on the network. 

B. A list of other DHCP clients. 

C. IP addresses and their lease times. 

D. Server time information 

Answer: C 


Q69. What is the basic unit of framing in SDH and the bit rate for its transmission? 

A. STM-1 with a bit rate of 1.544 Mbit/s 

B. STM-1 with a bit rate of 2.048 Mbit/s 

C. STM-1 with a bit rate of 51.84 Mbit/s 

D. STM-1 with a bit rate of 155.52 Mbit/s 

Answer: D 


Q70. Which technologies can be used with Ethernet switches to achieve redundancy? (Choose two) 

A. LAG 

B. OSPF 

C. RIP 

D. STP 

Answer: A,D