4A0-100 Online Practice Questions and Answers
What is the name for an organization that provides Internet services to its customers?
A. A large corporation.
B. An ISP.
C. A home based business.
D. A content provider.
Which of the following best describes an Ethernet bridge?
A. A passive device simply used to connect two or more cables. Does not generate or amplify any signals.
B. A device that receives and retransmits a signal out its other ports, but does not do any Layer 2 analysis of the data.
C. A device that receives a signal and based on the Layer 2 destination address, makes a decision on which ports the signal should be retransmitted.
D. A device that receives a signal and based on the Layer 3 destination address, makes a decision on which ports the signal should be retransmitted.
In the diagram, R3 receives an LSA with sequence number 112 from R7 and installs it in its link state database. 10 ms. Later it receives a copy of the same LSA with a sequence number of 111 from R1. What does R3 do with the LSA from R1?
A. R3 discards the LSA received from R1 and sends a copy of the LSA from its link state base to R1.
B. R3 installs the LSA received from R1 in its link state database and floods a copy to its neighbors.
C. R3 discards the LSA received from R1 and sends an ACK to R1.
D. R3 installs the LSA received from R1 in its link state database, sends an ACK to R1 and floods a copy to its neighbors.
Which statement best describes a VPRN service?
A. From the customers perspective it looks as if all sites are connected by the same set of dark fibers.
B. From the customers perspective it looks as if all sites are connected to a private switched network administered by the service provider.
C. From the customers perspective it looks as if all sites are connected to a private routed network administered by the service provider.
D. From the customers perspective it looks as if all sites have public internet access administered by the service provider.
Router R5 receives four route updates for the same prefix 10.10.10.1/32. Which of the four routes will be installed in R5's routing table?
A. Route learned from router R1.
B. Route learned from router R2.
C. Router learned from router R3.
D. Route learned from router R4.
Which of the following egress interfaces is used to forward a packet with destination IP address 140.10.0.110?
A. System interface
B. Interface "toC1"
C. Interface "toP1"
D. Interface "toP2"
Which of the following is a characteristic of Link State protocols?
A. Routers send a copy of their entire routing table to their neighbors.
B. Routers send frequent periodic updates to the entire network.
C. Routers know the entire network topology.
D. Routers use hop-count to calculate their routing tables.
Which of the following protocols can be used to force traffic from router R2 to use the direct link to router R4?
A. Static routing
B. IS-IS
C. OSPF
D. eBGP
What problem was Spanning Tree Protocol (STP) primarily designed to solve?
A. Broadcast storms caused by redundancy in Layer 2 networks.
B. Missing protocol field in the Ethernet header.
C. Missing sequence number in the Ethernet header.
D. Unreliable data transfer in Layer 2 networks.