Networking Past Paper PDF

Question 1 Under which circumstance will a switch flood a frame out of every port except the port that the frame was received on? - The destination address in the frame is a known unicast address. - The source address in the frame header is the broadcast address. - Correct Answer: The destination ad...

Question 1 Under which circumstance will a switch flood a frame out of every port except the port that the frame was received on? - The destination address in the frame is a known unicast address. - The source address in the frame header is the broadcast address. - Correct Answer: The destination address is unknown to the switch. - The source address in the frame is a multicast address. Question 2 Which statement describes the treatment of ARP requests on the local link? - They must be forwarded by all routers on the local network. - They are dropped by all switches on the local network. - They are received and processed only by the target device. - Correct Answer: They are received and processed by every device on the local network. Question 3 What important information is examined in the Ethernet frame header by a Layer 2 device in order to forward the data onward? - Destination IP address - Ethernet type - Source MAC address - Source IP address - Correct Answer: Destination MAC address Question 4 What property of ARP causes cached IP-to-MAC mappings to remain in memory longer? - The type field `0x806` appears in the header of the Ethernet frame. - The port-to-MAC address table on a switch has the same entries as the ARP table on the switch. - Correct Answer: Entries in an ARP table are time-stamped and are purged after the timeout expires. - A static IP-to-MAC address entry can be entered manually into an ARP table.  Question 5 What property of ARP allows MAC addresses of frequently used servers to be fixed in the ARP table? - Correct Answer: A static IP-to-MAC address entry can be entered manually into an ARP table. - The port-to-MAC address table on a switch has the same entries as the ARP table on the switch. - Entries in an ARP table are time-stamped and are purged after the timeout expires. - The type field `0x806` appears in the header of the Ethernet frame. Question 6 What property of ARP allows hosts on a LAN to send traffic to remote networks? - The destination MAC address `FF-FF-FF-FF-FF-FF` appears in the header of the Ethernet frame. - The source MAC address appears in the header of the Ethernet frame. - Correct Answer: Local hosts learn the MAC address of the default gateway. - The port-to-MAC address table on a switch has the same entries as the ARP table on the switch. Question 7 What property of ARP forces all Ethernet NICs to process an ARP request? - Correct Answer: The destination MAC address `FF-FF-FF-FF-FF-FF` appears in the header of the Ethernet frame. - The source MAC address appears in the header of the Ethernet frame. - The type field `0x806` appears in the header of the Ethernet frame. - ARP replies are broadcast on the network when a host receives an ARP request. Question 8 What property of ARP causes a reply only to the source sending an ARP request? - The type field `0x806` appears in the header of the Ethernet frame. - The destination MAC address `FF-FF-FF-FF-FF-FF` appears in the header of the Ethernet frame. - Correct Answer: The source MAC address appears in the header of the Ethernet frame. - ARP replies are broadcast on the network when a host receives an ARP request. Question 9 What property of ARP causes the request to flood out all ports of a switch except for the port receiving the ARP request? - Correct Answer: The destination MAC address `FF-FF-FF-FF-FF-FF` appears in the header of the Ethernet frame. - ARP replies are broadcast on the network when a host receives an ARP request. - The type field `0x806` appears in the header of the Ethernet frame. - Entries in an ARP table are time-stamped and are purged after the timeout expires. Question 10 What property of ARP causes the NIC that is receiving an ARP request to pass the data portion of the Ethernet frame to the ARP process? - ARP replies are broadcast on the network when a host receives an ARP request. - Correct Answer: The type field `0x806` appears in the header of the Ethernet frame. - The destination MAC address `FF-FF-FF-FF-FF-FF` appears in the header of the Ethernet frame. - Entries in an ARP table are time-stamped and are purged after the timeout expires. Here’s a cleaner version of your content, organized for clarity and readability: Question 11 Under which circumstance will a switch flood a frame out of every port except the port that the frame was received on? - Correct Answer: The destination address is unknown to the switch. - The destination address in the frame is a known unicast address. - The source address in the frame is a multicast address. - The source address in the frame header is the broadcast address. Question 12 What is a potential network problem that can result from ARP operation? - Correct Answer: Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic. - Multiple ARP replies result in the switch MAC address table containing entries that match the MAC addresses of hosts connected to the relevant switch port. - Manually configuring static ARP associations could facilitate ARP poisoning or MAC address spoofing. (Incorrect) - Large numbers of ARP request broadcasts could cause the host MAC address table to overflow and prevent the host from communicating on the network.  Question 13 Which statement describes the treatment of ARP requests on the local link? - Correct Answer: They are received and processed by every device on the local network. - They must be forwarded by all routers on the local network. - They are dropped by all switches on the local network. - They are received and processed only by the target device. Question 14 Which destination address is used in an ARP request frame? - Correct Answer: FFFF.FFFF.FFFF - 255.255.255.255 - 0.0.0.0 - The physical address of the destination host - AAAA.AAAA.AAAA Question 15 A network technician issues the `arp -d ` command on a PC after the router connected to the LAN is reconfigured. What is the result after this command is issued? - Correct Answer: The ARP cache is cleared. - The ARP cache is synchronized with the router interface. - The detailed information of the ARP cache is displayed. - The current content of the ARP cache is displayed. Question 16 Refer to the exhibit. The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC3. What will the switch do with the frame? - Correct Answer: The switch will forward the frame to all ports except port 4. - The switch will forward the frame to all ports. - The switch will discard the frame. - The switch will forward the frame only to ports 1 and 3. - The switch will forward the frame only to port 2. Question 17 What is the aim of an ARP spoofing attack? - Correct Answer: To associate IP addresses to the wrong MAC address. - To overwhelm network hosts with ARP requests. - To flood the network with ARP reply broadcasts. - To fill switch MAC address tables with bogus addresses. Question 18 Refer to the exhibit. PC1 attempts to connect to File_server1 and sends an ARP request to obtain a destination MAC address. Which MAC address will PC1 receive in the ARP reply? - Correct Answer: The MAC address of the G0/0 interface on R1. - The MAC address of S2. - The MAC address of S1. - The MAC address of File_server1. - The MAC address of the G0/0 interface on R2. Question 19 Which two types of IPv6 messages are used in place of ARP for address resolution? - Correct Answer: Neighbor Solicitation and Neighbor Advertisement. - Echo Reply and Echo Request. - Router Solicitation and Router Advertisement. - Anycast and Broadcast. Question 20 Where are IPv4 address to Layer 2 Ethernet address mappings maintained on a host computer? - Correct Answer: ARP Cache. - Neighbor Table. - Routing Table. - MAC Address Table.