Podcast
Questions and Answers
Which of the following statements about routing decisions is true?
Which of the following statements about routing decisions is true?
What is the primary purpose of a routing table?
What is the primary purpose of a routing table?
Which routing protocol uses hop count as its metric?
Which routing protocol uses hop count as its metric?
Which of the following metrics is not used by EIGRP for determining the best path?
Which of the following metrics is not used by EIGRP for determining the best path?
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What does the code 'L' represent in a routing table entry?
What does the code 'L' represent in a routing table entry?
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What does the code 'S' represent in a routing table entry?
What does the code 'S' represent in a routing table entry?
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What does the 'C' entry in a routing table represent?
What does the 'C' entry in a routing table represent?
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Which characteristic of a routing table entry is used to determine the best path to a destination network?
Which characteristic of a routing table entry is used to determine the best path to a destination network?
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What information does the 'next-hop' field in a routing table entry provide?
What information does the 'next-hop' field in a routing table entry provide?
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What is the purpose of static routing?
What is the purpose of static routing?
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Which type of routing can automatically adjust to topology changes without involving the network administrator?
Which type of routing can automatically adjust to topology changes without involving the network administrator?
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What does the 'L' entry in a routing table represent?
What does the 'L' entry in a routing table represent?
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What command is used to display the IPv4 routing table on a Cisco router?
What command is used to display the IPv4 routing table on a Cisco router?
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What is the minimum requirement for an interface to be considered up/up and added to the IPv4 routing table?
What is the minimum requirement for an interface to be considered up/up and added to the IPv4 routing table?
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What do the route source codes 'C' and 'L' indicate in the routing table entries for directly connected interfaces?
What do the route source codes 'C' and 'L' indicate in the routing table entries for directly connected interfaces?
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What information is included in a directly connected routing table entry?
What information is included in a directly connected routing table entry?
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How are directly connected networks added to the routing table?
How are directly connected networks added to the routing table?
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What is the purpose of the 'no shutdown' command on an interface?
What is the purpose of the 'no shutdown' command on an interface?
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Study Notes
Routing Decisions
- Routing decisions are crucial for determining the optimal path for data packets in a network infrastructure.
- Accurate routing decisions enhance network efficiency and reliability.
Routing Table Purpose
- The primary purpose of a routing table is to store routes to various network destinations and to determine the best path for forwarding packets.
Routing Protocols and Metrics
- The routing protocol that uses hop count as its metric is RIP (Routing Information Protocol).
- EIGRP (Enhanced Interior Gateway Routing Protocol) employs several metrics to calculate the best path, excluding hop count as it considers bandwidth, delay, load, and reliability.
Routing Table Entry Codes
- The code 'L' in a routing table entry signifies a local route, indicating that the interface is directly connected.
- The code 'S' represents a static route, which does not change unless manually modified by the network administrator.
- The 'C' entry denotes connected routes, which are directly linked to the router's interfaces.
Best Path Determination
- The characteristic used to determine the best path in a routing table entry is the metric, which can involve various factors including bandwidth and delay.
Next-Hop Field
- The 'next-hop' field provides the IP address of the next router to which the packet should be forwarded on its way to the destination network.
Static Routing
- Static routing is used to manually configure routes in a network, allowing for control over path selection.
Automatic Routing Adjustment
- Dynamic routing protocols can automatically adjust to topology changes without requiring intervention from the network administrator.
Interface Status and Commands
- The minimum requirement for an interface to be considered up/up and added to the routing table is that both the interface and line protocols must be operational.
- The command
show ip route
is used to display the IPv4 routing table on a Cisco router.
Directly Connected Networks
- Directly connected networks are added to the routing table automatically when an interface is activated and assigned an IP address.
- The 'no shutdown' command is used to enable an interface, transitioning it from a down state to an operational state, allowing it to participate in the routing process.
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Description
Test your knowledge on path determination, routing decisions, and best path selection in networking. Explore the concept of metrics and how dynamic routing protocols update routing tables.