Networking Basics Quiz
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What will happen if the default gateway address is incorrectly configured on a host?

  • The host cannot communicate with other hosts in the local network.
  • The switch will not forward packets initiated by the host.
  • The host will have to use ARP to determine the correct address of the default gateway.
  • The host cannot communicate with hosts in other networks. (correct)

    • Which characteristic describes the default gateway of a host computer?

  • The physical address of the switch interface connected to the host computer.
  • The logical address of the router interface on the same network as the host computer. (correct)
  • The logical address assigned to the switch interface connected to the router.
  • The physical address of the router interface on the same network as the host computer.

    • A computer in a given network is communicating with a specific group of computers. What type of communication is this?

  • Broadcast
  • Multicast (correct)
  • Unicast
  • Anycast

    • How many bits are in an IPv4 address?

    <p>32</p> Signup and view all the answers

    What does the IP address 172.17.4.250/24 represent?

    <p>Host address</p> Signup and view all the answers

    What is the purpose of the subnet mask in conjunction with an IP address?

    <p>To determine the subnet to which the host belongs.</p> Signup and view all the answers

    What subnet mask is represented by the slash notation /20?

    <p>255.255.224.0</p> Signup and view all the answers

    Which three IP addresses are private?

    <p>192.168.5.5</p> Signup and view all the answers

    Which two things can be determined by using the ping command?

    <p>the average time it takes a packet to reach the destination and for the response to return to the source</p> Signup and view all the answers

    What is the binary equivalent of the decimal number 232?

    <p>11101000</p> Signup and view all the answers

    What is the decimal equivalent of the binary number 10010101?

    <p>149</p> Signup and view all the answers

    Which feature allows different communication streams to occur simultaneously without one data stream monopolizing the bandwidth?

    <p>multiplexing</p> Signup and view all the answers

    What is used by the transport layer at the receiver to pass the data stream to the proper application on the server?

    <p>destination port number</p> Signup and view all the answers

    What is a beneficial feature of the UDP transport protocol?

    <p>fewer delays in transmission</p> Signup and view all the answers

    Which field in the IPv4 header is used to prevent a packet from traversing a network endlessly?

    <p>Time-to-Live</p> Signup and view all the answers

    What IPv4 header field identifies the upper layer protocol carried in the packet?

    <p>Protocol</p> Signup and view all the answers

    What command should a network administrator issue to save the router configuration for automatic use after rebooting?

    <p>copy running-config startup-config</p> Signup and view all the answers

    What must be configured on a computer to ensure it can access the internet in addition to its existing IP address, subnet mask, and DNS server?

    <p>the default gateway address</p> Signup and view all the answers

    How will a computer send a packet to a destination host on the same LAN?

    <p>The packet will be sent directly to the destination host.</p> Signup and view all the answers

    If a packet is leaving PC-1 to reach PC-4, how many hops will it traverse?

    <p>2</p> Signup and view all the answers

    What does the command 'reload' do in a router setting?

    <p>It restarts the router without saving the configurations.</p> Signup and view all the answers

    What is the primary function of the router IOS on startup?

    <p>To contain the commands that are used to initially configure a router</p> Signup and view all the answers

    Which statement highlights a key enhancement of IPv6 over IPv4?

    <p>IPv6 supports privacy capabilities whereas IPv4 does not.</p> Signup and view all the answers

    What is the Network Destination for the first entry in the table?

    <p>192.168.10.10</p> Signup and view all the answers

    What field in the IPv4 header defines the packet's priority?

    <p>Differentiated services</p> Signup and view all the answers

    What does the Metric value of the first entry in the table indicate?

    <p>It is used to decide the best route.</p> Signup and view all the answers

    Which code represents a directly connected route in an IPv4 routing table?

    <p>C</p> Signup and view all the answers

    Why is Network Address Translation (NAT) deemed unnecessary in IPv6?

    <p>IPv6 has a significantly larger address space than IPv4.</p> Signup and view all the answers

    What interface will R1 forward a packet destined for 192.168.2.10?

    <p>FastEthernet0/0</p> Signup and view all the answers

    What is the role of the Flow Label field in an IPv6 packet?

    <p>To maintain a consistent path for real-time applications</p> Signup and view all the answers

    Which two commands can be utilized on a Windows host to view the routing table?

    <p>netstat -r</p> Signup and view all the answers

    Which option describes the next step after the IOS loads from flash during the router boot sequence?

    <p>Locate and load the startup-config file from NVRAM.</p> Signup and view all the answers

    What action does a router take immediately after matching the destination IP address to a network in its routing table?

    <p>Look up the next-hop address for the packet</p> Signup and view all the answers

    Which two pieces of information are stored in the RAM of a Cisco router during normal operation?

    <p>Cisco IOS</p> Signup and view all the answers

    What characterizes the address system used in IPv6, compared to IPv4?

    <p>IPv6 features a 128-bit flat addressing model.</p> Signup and view all the answers

    What is the purpose of the startup configuration file on a Cisco router?

    <p>To provide the initial configuration after booting.</p> Signup and view all the answers

    Which Metric value indicates the highest priority in routing conditions?

    <p>0</p> Signup and view all the answers

    Study Notes

    Default Gateway

    • A host with an incorrectly configured default gateway cannot communicate with hosts on other networks.
    • The default gateway is the logical address of the router interface on the same network as the host.

    Network Communication

    • Multicast is a communication method that allows a single packet to be sent to a group of hosts.
    • Unicast is a communication method that allows communication to occur between specific hosts.
    • The range of 224.0.0.0 to 224.0.0.255 is used for multicast groups on a local network.

    IPv4 Addresses

    • IPv4 addresses are composed of 32 bits.
    • The network portion of the IPv4 address identifies the subnet to which the host belongs.
    • The host portion of the IPv4 address uniquely identifies a host on a network.
    • An IPv4 address with a /24 notation indicates the subnet mask is 255.255.255.0.
    • The subnet mask determines the subnet to which the host belongs.
    • The slash notation /20 represents the subnet mask 255.255.224.0.

    Private IP Addresses

    • Private IP addresses are used within an organization's network and are not routable on the public Internet.
    • Examples of private IP addresses include: 10.1.1.1, 172.16.4.4, and 192.168.5.5.

    Ping Command

    • The ping command can be used to determine if the destination device is reachable through the network.
    • The ping command provides the average time it takes a packet to reach the destination and for the response to return to the source.

    Binary Numbers

    • The decimal number 232 is equivalent to the binary number 11101000.
    • The binary number 10010101 is equivalent to the decimal number 157.

    Network Features

    • Multiplexing allows different communication streams to occur at the same time without a single data stream using all available bandwidth.
    • Port numbers are used by the transport layer at the receiver to pass the data stream to the proper application on the server.

    UDP Transport Protocol

    • The UDP transport protocol offers a faster transmission rate compared to TCP.
    • UDP does not guarantee delivery or data order and lacks the capability to retransmit lost data.

    IPv4 Header Fields

    • The Time-to-Live field in the IPv4 header prevents packets from traversing a network endlessly.
    • The Protocol field in the IPv4 header identifies the upper layer protocol carried in the packet.

    Routing Tables

    • A router will use the route that matches the network destination and has the lowest metric.
    • A directly connected route is indicated by the code "C" in an IPv4 routing table on a Cisco router.
    • The default route has a destination network of 0.0.0.0 with a subnet mask of 0.0.0.0.

    Cisco Router Boot Sequence

    • After the IOS loads from flash, the router will locate and load the startup-config file from NVRAM during its boot sequence.
    • The Cisco IOS and the IP routing table are stored in the RAM of a Cisco router during normal operation.

    Router Configuration

    • The startup configuration file stores the commands that the router will use when it boots.
    • To save the router's current configuration into the startup configuration file, use the command copy running-config startup-config.

    IPv6

    • IPv6 uses a 128-bit addressing scheme, significantly larger than the 32-bit addressing of IPv4.
    • The IPv6 header is simpler and more streamlined than the IPv4 header, leading to improved packet handling.
    • IPv6 provides end-to-end connectivity and eliminates the need for NAT.
    • The Flow Label field in the IPv6 header can classify packets for traffic congestion control.

    Routing Table Commands

    • The netstat -r command can be used to display the routing table on a Windows host.
    • The route print command can also be used to display the routing table on a Windows host.

    Router Packet Forwarding

    • When a router receives a packet, it will match the destination IP address to a network in its routing table.
    • If the destination IP address matches a directly connected route, the packet will be switched to the directly connected interface.

    Network Access Configuration

    • To access the internet from a computer on a corporate network, the computer must be configured with an IP address, a subnet mask, a DNS server, and a default gateway.

    Packet Transmission

    • A packet sent from a host to a destination host on the same LAN will be sent directly to the destination host.
    • Packets must traverse all routers between a source and destination host.

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    Related Documents

    Revision Questions-part 2.pdf

    Description

    Test your knowledge on networking fundamentals, including default gateways, network communication methods, and IPv4 addressing. This quiz covers critical concepts like unicast and multicast communication, as well as subnetting rules. Perfect for beginners looking to solidify their understanding of network configurations.

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