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WorksheetsDCN_Unit4
Total questions: 10
Worksheet time: 10mins
You are designing a network router and need to choose a forwarding mechanism. The router must handle high-speed packet switching with minimum contention. Which switching fabric would you implement?
Switching via memory
Switching via a bus
Switching via interconnection network
Switching via application processor
A packet arrives at a router with destination address 11001000 00010111 00011000 10101010. Based on the following table, determine the outgoing interface using the longest prefix match.
0
1
2
3
A company with multiple departments wants to reduce IP address wastage and simplify routing. Which addressing strategy should be used?
NAT
Subnetting
DHCP
IP fragmentation
A router uses the Distance Vector Routing algorithm. Node X receives the following updates from its neighbors: What will be the updated Dx(Z)?
6
4
7
3
In Dijkstra’s algorithm, which node will be added next to the set of known nodes if the tentative distances are as follows?
W
V
X
Y
You are configuring a DHCP server in a network. A client sends a DHCP Discover message. What should be the next appropriate action by the server?
Send DHCP ACK
Assign a MAC address to the client
Send DHCP Offer
Send ICMP message to confirm request
Consider a router's output port where packets are arriving faster than the transmission rate. What consequence is most likely?
Packets are sent back to the sender
Output port queueing occurs, possibly leading to packet loss
Packets are rerouted to another output port
IP fragmentation is performed
A router receives an IP packet with a payload of 4000 bytes and the MTU of the outgoing link is 1500 bytes. What is the number of fragments created?
2
3
4
5
Which of the following best explains why poisoned reverse is used in distance vector routing?
To reduce link costs
To accelerate convergence of Dijkstra’s algorithm
To enable IP fragmentation
To handle routing loops by advertising a route as unreachable
You are implementing NAT in a home network. What does the NAT router modify in outgoing packets?
Source MAC address
Destination MAC address
Source IP address and port number
Destination IP address and TTL
