4A0-100 Online Practice Questions and Answers

Which of the following statements best describes ARPANET?

A. ARPANET was an early packet switched network initially connecting 4 sites (Stanford, UC Santa Barbara, UCLA, and U of Utah).

B. The mission of ARPANET was to connect packet switched networks and other diverse networks, making an international network of networks.

C. ARPANET connected sites spread around the Hawaiian Islands to a central time-sharing computer on the University of Hawaii campus.

D. ARPANET was based on the use of TCP/IP to interconnect diverse systems.

What happens immediately after an Ethernet switch receives an Ethernet frame?

A. It records the destination MAC address and the interface on which it arrived.

B. It records the source MAC address and the interface on which it arrived.

C. It floods the frame out of all its interfaces except the interface on which the frame arrived.

D. It transmits the frame out of the appropriate interface.

Which three of the following are important considerations when designing subnets? (Choose three.)

A. Number of subnetworks currently required.

B. Type of physical connectivity used by each segment.

C. Future network growth requirements.

D. Number of hosts each subnetwork will support.

E. Class of the network address to be used for the network.

What is the preference value in the routing table used for?

A. It indicates the preferred egress interface.

B. It differentiates between multiple routes to a destination learned by the same protocol.

C. It differentiates between multiple routes to a destination learned by different routing protocols.

D. It is used to differentiate local routes from remote routes.

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.

What is the purpose of the source and destination ports in the TCP header?

A. These ports identify the physical location of the sender and the receiver on the IP router.

B. These ports are used as addresses to communicate with the IP layer.

C. TCP does not use source or destination ports.

D. These ports are used as an address to identify the upper layer application using the TCP connection.

If a customer requires a multipoint layer 2 VPN service between three or more locations which VPN service is best suited for this customer?

A. Virtual Private Wire Service

B. Virtual Private LAN Service

C. Virtual Private Routed Networks

D. Virtual Private Dark Fibre Service

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

Which of the following statements about router R1 is TRUE?

A. Router R1 is an iLER for both LSPs.

B. Router R1 is an eLER for both LSPs.

C. Router R1 is an iLER for LSP A and an eLER for LSP B.

D. Router R1 is an iLER for LSP B and an eLER for LSP A.

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.