Router Functions and Device Connections
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Questions and Answers

What is the primary function of a router?

  • To create user interfaces
  • To store data permanently
  • To manage database queries
  • To route traffic between networks (correct)

    • Routers do not have a CPU as part of their components.

    False

    What operating system do routers commonly use?

    Cisco IOS

    Routers use _____ to determine the best path for sending packets.

    <p>routing tables</p> Signup and view all the answers

    Match the router components with their functions:

    <p>CPU = Processes data OS = Manages router operations RAM = Temporary data storage Flash = Permanent data storage</p> Signup and view all the answers

    Which of the following statements is true regarding routers?

    <p>Routers can connect multiple networks.</p> Signup and view all the answers

    Dynamic routing protocols are not used by routers to learn about remote networks.

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

    What is a default gateway in network configurations?

    <p>It is the IP address that enables devices to access external networks.</p> Signup and view all the answers

    What is the purpose of a default gateway?

    <p>Identifies the router a packet is sent to when the destination is not on the same local network subnet</p> Signup and view all the answers

    A router interface must be activated with the 'no shutdown' command by default.

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

    What should network documentation include for devices?

    <p>Device names, interfaces, IP addresses, subnet mask, and default gateways</p> Signup and view all the answers

    On a switch, the management IP address is assigned on a ______ interface.

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

    Match the following basic router setting tasks with their descriptions:

    <p>Name the device = Distinguishes it from other routers Secure management access = Secures EXEC access and encrypts passwords Configure a banner = Provides notification of unauthorized access Save the Configuration = Preserves settings for future use</p> Signup and view all the answers

    Which command is used to activate a router interface?

    <p>no shutdown</p> Signup and view all the answers

    All devices in a network must have the same default gateway.

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

    What must be configured for a router interface to be available?

    <p>An address and subnet mask, and it must be activated</p> Signup and view all the answers

    Which command is NOT used to verify interface settings?

    <p>show log</p> Signup and view all the answers

    The best path to a network is determined by the highest metric value.

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

    What is the purpose of the 'show ip route' command?

    <p>It displays the routing table for the device.</p> Signup and view all the answers

    A metric is a value used to measure the ______ to a given network.

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

    Match the following commands with their functions:

    <p>show ip interfaces brief = Verifies operational status of interfaces show interfaces = Shows detailed interface statistics show running-config = Displays the current configuration settings show ip interfaces = Provides information on IP protocol for interfaces</p> Signup and view all the answers

    What is the first step in the packet switching process?

    <p>Send a packet</p> Signup and view all the answers

    The path determination process involves selecting a network path that has the highest speed.

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

    What does a router do during the packet routing process?

    <p>It forwards packets based on the routing table.</p> Signup and view all the answers

    What type of routes are added to the routing table automatically when an interface is active and configured?

    <p>Directly connected routes</p> Signup and view all the answers

    Static routes need to be updated manually if the network topology changes.

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

    What command is used to configure a static route to a specific network?

    <p>ip route network mask {next-hop-ip | exit-intf}</p> Signup and view all the answers

    Which command is used to configure a default static route?

    <p>ip route 0.0.0.0 0.0.0.0 {exit-intf | next-hop-ip}</p> Signup and view all the answers

    A newly deployed router starts with an ______ routing table.

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

    Dynamic routing protocols can automatically share information about network reachability.

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

    Match the following types of routes with their descriptions:

    <p>Directly Connected (C) = Automatically added when an interface is active Static Route = Manually configured path between networks Dynamic Route = Added via EIGRP or OSPF Default Static Route = Used when no path exists for a destination</p> Signup and view all the answers

    Which entry in the routing table is created for a directly connected interface?

    <p>Link Local (L)</p> Signup and view all the answers

    Name one dynamic IPv4 routing protocol supported by Cisco ISR routers.

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

    The command to configure a static route includes 'ip route 0.0.0.0 0.0.0.0 _____'.

    <p>{exit-intf | next-hop-ip}</p> Signup and view all the answers

    Dynamic routing protocols are added to the routing table when EIGRP or OSPF are implemented.

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

    A default static route is utilized when the routing table does not contain a path for a ______ network.

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

    Match the following dynamic routing protocols with their abbreviations:

    <p>Enhanced Interior Gateway Routing Protocol = EIGRP Open Shortest Path First = OSPF Intermediate System-to-Intermediate System = IS-IS Routing Information Protocol = RIP</p> Signup and view all the answers

    Study Notes

    Router Functions

    • Routers interconnect networks by connecting multiple networks with multiple interfaces, each on a different IP network.
    • Routers are specialized computers with a central processing unit (CPU), an operating system (OS) like Cisco IOS, and memory and storage (RAM, ROM, NVRAM, Flash, hard drive).
    • Routers choose the best path to send packets using static routes and dynamic routing protocols to learn about remote networks and build their routing tables.
    • Routers encapsulate packets and forward them to the interface indicated in the routing table.
    • Routers determine the best path based on the lowest metric, which is a value used to measure the distance to a given network.

    Connecting Devices

    • Devices need an IP address, subnet mask, and a default gateway to access a network.
    • The default gateway identifies the router a packet is sent to when the destination is not on the same local network subnet.

    Network Documentation

    • Network Documentation should include a topology diagram with device names, interfaces, IP addresses and subnet masks, and default gateways.

    IP on a Switch

    • Network infrastructure devices require IP addresses for remote management.
    • The management IP address on a switch is assigned to a virtual interface.

    Basic Router Settings

    • Basic tasks on a Cisco Router and Switch include naming the device, securing management access, configuring a banner for legal notification, and saving the configuration.

    Configuring an IPv4 Router Interface

    • A router interface must be configured with an IP address and subnet mask and activated using the "no shutdown" command to be available.
    • LAN and WAN interfaces are not activated by default.

    Verifying Connectivity

    • Use show commands to verify operation and configuration of interfaces (e.g., show ip interfaces brief, show ip route, show running-config).
    • Use show commands to gather more detailed interface information (e.g., show interfaces, show ip interfaces).

    Switching Packets

    • Routers use routing decisions to select the best path, which is the path with the lowest metric.
    • Routing table sources include directly connected interfaces, static routes, and dynamic routing protocols.
    • Directly connected interfaces create two routing table entries: Link Local (L) and Directly Connected (C).
    • Static routes are manually configured and define an explicit path between two networking devices.
    • Default static routes are used when the routing table does not contain a path for a destination network.
    • Dynamic routing protocols share information about the reachability and status of remote networks, performing network discovery and maintaining routing tables.
    • Cisco ISR routers support various dynamic IPv4 routing protocols, including:
      • EIGRP (Enhanced Interior Gateway Routing Protocol)
      • OSPF (Open Shortest Path First)
      • IS-IS (Intermediate System-to-Intermediate System)
      • RIP (Routing Information Protocol)

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    Related Documents

    Cisco Router Functions PDF

    Description

    Explore the essential functions of routers and how devices connect to networks. This quiz covers topics like IP addressing, routing protocols, and network documentation. Test your understanding of the critical role routers play in networking.

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