Static Routes in Networking
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Questions and Answers

What is the primary function of a default route in a router?

  • To filter out incoming traffic from other networks
  • To determine the source IP address of a packet
  • To act as a last resort when no other route is available (correct)
  • To forward packets to their final destination directly

    • What type of route is a default route an example of?

  • Static route (correct)
  • Directly connected route
  • Dynamic route
  • Routing protocol-based route

    • What is the purpose of the 0.0.0.0 0.0.0.0 syntax in a routing table?

  • To represent the default route (correct)
  • To define a static route to a specific network
  • To specify a directly connected network
  • To filter out incoming traffic from other networks

    • How does a router forward packets based on its routing table?

    <p>By looking at the destination IP address and forwarding accordingly</p> Signup and view all the answers

    What is the purpose of the ip route command on a Cisco router?

    <p>To add a static route to the routing table</p> Signup and view all the answers

    What happens when a router receives a packet with a destination IP address that is not in its routing table?

    <p>The router uses its default route to forward the packet</p> Signup and view all the answers

    What is the goal of a router in terms of forwarding IP packets?

    <p>To look at the IP header, forward the packet, and then move on to the next packet</p> Signup and view all the answers

    What is the result of adding a default route to a router's routing table?

    <p>The router will use the default route as a last resort</p> Signup and view all the answers

    Why is it important for all routers in a network to have correct routing information?

    <p>To ensure that packets are forwarded to their final destination</p> Signup and view all the answers

    What is the purpose of the show ip route command on a Cisco router?

    <p>To display the routing table</p> Signup and view all the answers

    What is the purpose of adding a static route on Router_2?

    <p>To specify a fixed path for packets destined for the 10.1.0 network.</p> Signup and view all the answers

    When Router_2 forwards a packet to Router_1, what remains unchanged in the packet's headers?

    <p>The layer 3 destination address.</p> Signup and view all the answers

    What is the command used to add a static route on a Cisco device?

    <p>ip route 10.1.0.0 255.255.255.0 10.12.0.1</p> Signup and view all the answers

    What does Router_2 send to resolve the layer 2 address of Router_1?

    <p>An ARP request.</p> Signup and view all the answers

    What is indicated when Router_2 has a routing entry with an 'S' code?

    <p>It indicates a static route has been configured.</p> Signup and view all the answers

    What is the next hop IP address specified for reaching the 10.1.0 network from Router_2?

    <p>10.12.0.1</p> Signup and view all the answers

    Which network mask is used for the 10.1.0.0 network when adding the static route?

    <p>255.255.255.0</p> Signup and view all the answers

    What will Router_1 do when it receives a packet for 10.1.0.50?

    <p>Respond directly to the packet since it is connected to the network.</p> Signup and view all the answers

    What aspect does the static route on Router_2 improve in terms of networking?

    <p>Improves packet forwarding efficiency to a specific network.</p> Signup and view all the answers

    What characterizes a static route in network configuration?

    <p>It is manually configured by a network administrator.</p> Signup and view all the answers

    When Router_2 receives a packet destined for 10.1.0.50, what does it first check?

    <p>Its routing table for matching routes.</p> Signup and view all the answers

    What is the likely outcome if Router_2 does not find a matching route in its routing table?

    <p>It will drop the packet as it cannot determine a route.</p> Signup and view all the answers

    For what purpose does a network administrator configure a static route?

    <p>To provide consistent and predictable routing to specific destinations.</p> Signup and view all the answers

    Which best describes the process of troubleshooting Router_2 when a packet is dropped?

    <p>Checking for a matching route in the routing table for the destination address.</p> Signup and view all the answers

    What type of address format is used to indicate both the network and host in the example provided?

    <p>24-bit subnet mask.</p> Signup and view all the answers

    What action must be taken to allow Router_2 to forward a packet to 10.1.0.50?

    <p>Add a static route to the routing table for the destination address.</p> Signup and view all the answers

    What is a potential drawback of using static routes in network environments?

    <p>They require ongoing maintenance and updates.</p> Signup and view all the answers

    Why does the PC need a default route to respond to the ping request from the router?

    <p>The PC needs a default route to send replies to any destination outside its local network.</p> Signup and view all the answers

    What is the primary difference between a static network route and a static host route?

    <p>A network route applies to a range of IP addresses within a network, while a host route applies to a single specific IP address.</p> Signup and view all the answers

    In the provided scenario, why did the router use its IP address 10.12.0.2 as the source address for the ping request?

    <p>The router selected the closest interface to the target PC as the source address.</p> Signup and view all the answers

    What is the role of the default gateway in the PC's response to the ping request from the router?

    <p>The default gateway acts as a forwarding point for the PC to send replies to destinations outside its local network.</p> Signup and view all the answers

    What is the purpose of the static route configured for the 10.1.0.2 host address on the router?

    <p>The static route ensures that the router can send packets directly to the PC without going through R_1.</p> Signup and view all the answers

    Which of the following statements accurately describes the difference between a 32-bit mask and a 24-bit mask in the context of static routes?

    <p>A 32-bit mask defines a single host, while a 24-bit mask defines a subnet of hosts.</p> Signup and view all the answers

    Which of the following is NOT a benefit of using a static route?

    <p>Static routes are easy to manage and troubleshoot in complex network environments.</p> Signup and view all the answers

    How does the router determine the next hop for a packet destined for the PC's IP address when using the static route for 10.1.0.2?

    <p>The router checks its routing table and identifies the next hop based on the most specific match for the destination IP address.</p> Signup and view all the answers

    Why would the router not need both the 24-bit network route and the 32-bit host route for the 10.1.0.0 network?

    <p>The host route is a more specific route, so it takes precedence over the network route.</p> Signup and view all the answers

    What is the purpose of the default route configured on the PC?

    <p>The default route is used as a fallback option for the PC to reach any destination that is not explicitly defined in its routing table.</p> Signup and view all the answers

    What is the significance of the address 0.0.0.0 in static routing?

    <p>It serves as the default route if no better match exists.</p> Signup and view all the answers

    Which command is used to add a static route on a Windows computer?

    <p>route ADD</p> Signup and view all the answers

    What does the '-p' option do when adding a static route in Windows?

    <p>Makes the route persistent across reboots.</p> Signup and view all the answers

    Why is the method of manually configuring static routes considered tedious?

    <p>It is not adaptable to address changes.</p> Signup and view all the answers

    In static routing, what does adding a route for a network imply?

    <p>It is less complex than adding a route for an individual host.</p> Signup and view all the answers

    What happens to a static route that is not marked as persistent after rebooting the computer?

    <p>It is deleted from the routing table.</p> Signup and view all the answers

    Which aspect makes static routing less suitable for larger networks?

    <p>It requires extensive manual configuration.</p> Signup and view all the answers

    What is an example of a metric in static routing?

    <p>The number of hops to reach a destination.</p> Signup and view all the answers

    When using the route command in Windows, what is necessary to display the current routing table?

    <p>route print</p> Signup and view all the answers

    How does static routing utilize the concept of next hop?

    <p>It identifies the next layer 3 device in the path.</p> Signup and view all the answers

    Study Notes

    Static Routes

    • A static route is manually configured by an administrator to instruct a device on how to forward a packet to reach a destination network.
    • Example: PC1 on 10.1.0.0 network, with host address 10.1.0.50, and Router_2 needs to know how to forward packets to PC1.

    Router_2 Configuration

    • Initially, Router_2's routing table does not have a route to 10.1.0.0 network, and would drop packets destined for PC1.
    • To resolve this, a static route is added on Router_2 to forward packets to 10.1.0.0 network via Router_1 at 10.12.0.1 (next hop).

    Static Route Command

    • The command to add a static route on a Cisco device is ip route .
    • Example: ip route 10.1.0.0 255.255.255.0 10.12.0.1

    Types of Static Routes

    • Network static route: specifies a range of IP addresses (e.g., 10.1.0.0/24).
    • Host static route: specifies an exact IP address (e.g., 10.1.0.2/32).
    • Default static route: used when no other route matches the destination IP address (e.g., 0.0.0.0/0).

    Default Route

    • A default route is used when a router does not have a more specific route to a destination network.
    • Example: on Router_1, a default route is added to forward packets to Router_2 at 10.12.0.2.

    Static Routes on End Devices

    • Static routes can also be configured on end devices (e.g., Windows computers).
    • Example: route add 157.0.0.0 mask 255.0.0.0 192.168.1.1 adds a static route to the 157 network via the next hop 192.168.1.1.

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    Description

    This quiz tests your understanding of static routes, their manual configuration and implementation in network topology. It covers the basics of static routes and their application.

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