The physical networks connecting two PCs to the internet are DSL and PPP respectively. Which layer will enable the two PCs to communicate?

• A.Layer 1
• B.Layer 2
• C.Layer 3
• D.Layer 4

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Which of the following statements best describes ARPANET?

• A.ARPANET was based on the use of TCP/IP to interconnect diverse systems.
• B.ARPANET was an early packet switched network initially connecting 4 sites (Stanford, UC Santa Barbara, UCLA, and U of Utah).
• C.The mission of ARPANET was to connect packet switched networks and other diverse networks,making an international network of networks.
• D.ARPANET connected sites spread around the Hawaiian Islands to a central timesharing computer on the University of Hawaii campus.

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Based on the network diagram (click the Exhibit Button).

R2 wants to connect a host on 192.168.2.0/24 behind CR1. What is the correct next-hop to use, assuming R1 is configured correctly?

• A.10.1.1.2
• B.10.2.3.2
• C.10.1.1.1
• D.10.2.3.1

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Which tier of Internet service providers can reach any part of the Internet without having to purchase transit services from other Internet service providers?

• A.A Tier 2 ISP
• B.A Tier 1 ISP
• C.A Tier 3 ISP
• D.Tier 1 and Tier 2 ISPs

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Which of the following IP header fields defines the way packets should be queued?

• A.Identification
• B.Protocol
• C.Flags
• D.Type of Service

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