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ITNv7 Practice Final Exam Answers 1. A client packet is received by a server. The packet has a destination port number of 22. What service is the client requesting? SSH* TFTP DHCP DNS 2. Refer to the exhibit. CCNA 1 v7 ITN Practice Final Exam Answers p2 What does the value of the window size specify? the amount of data that can be sent at one time the amount of data that can be sent before an acknowledgment is required* the total number of bits received during this TCP session a random number that is used in establishing a connection with the 3- way handshake Explanation: The window size determines the number of bytes that can be sent before expecting an acknowledgment. The acknowledgment number is the number of the next expected byte. 3. To which TCP port group does the port 414 belong? well-known* private or dynamic public registered Explanation: Well Known Ports: 0 through 1023. Registered Ports: 1024 through 49151. Dynamic/Private : 49152 through 65535. 4. Refer to the exhibit. CCNA 1 v7 ITN Practice Final Exam Answers p4 An administrator is trying to configure the switch but receives the error message that is displayed in the exhibit. What is the problem? The entire command, configure terminal, must be used. The administrator is already in global configuration mode. The administrator must first enter privileged EXEC mode before issuing the command.* The administrator must connect via the console port to access global configuration mode. Explanation: In order to enter global configuration mode, the command configure terminal, or a shortened version such as config t, must be entered from privileged EXEC mode. In this scenario the administrator is in user EXEC mode, as indicated by the > symbol after the hostname. The administrator would need to use the enable command to move into privileged EXEC mode before entering the configure terminal command. 5. What is a user trying to determine when issuing a ping 10.1.1.1 command on a PC? if the TCP/IP stack is functioning on the PC without putting traffic on the wire if there is connectivity with the destination device* the path that traffic will take to reach the destination what type of device is at the destination Explanation: The ping destination command can be used to test connectivity. 6. What is a characteristic of a switch virtual interface [SVI]? An SVI is created in software and requires a configured IP address and a subnet mask in order to provide remote access to the switch.* Although it is a virtual interface, it needs to have physical hardware on the device associated with it. SVIs do not require the no shutdown command to become enabled. SVIs come preconfigured on Cisco switches. Explanation: Cisco IOS Layer 2 switches have physical ports for devices to connect. These ports do not support Layer 3 IP addresses. Therefore, switches have one or more switch virtual interfaces [SVIs]. These are virtual interfaces because there is no physical hardware on the device associated with it. An SVI is created in software. The virtual interface lets you remotely manage a switch over a network using IPv4 and IPv6. Each switch comes with one SVI appearing in the default configuration “out-of-the-box.” The default SVI is interface VLAN1. 7. Match the descriptions to the terms. [Not all options are used.] CCNA 1 v7 ITN Practice Final Exam Answers p7 8. What happens when a switch receives a frame and the calculated CRC value is different than the value that is in the FCS field? The switch notifies the source of the bad frame. The switch places the new CRC value in the FCS field and forwards the frame. The switch drops the frame.* The switch floods the frame to all ports except the port through which the frame arrived to notify the hosts of the error. 9. Two network engineers are discussing the methods used to forward frames through a switch. What is an important concept related to the cut-through method of switching? The fragment-free switching offers the lowest level of latency.* Fast-forward switching can be viewed as a compromise between store- and-forward switching and fragment-free switching. Fragment-free switching is the typical cut-through method of switching. Packets can be relayed with errors when fast-forward switching is used. 10. Which two issues can cause both runts and giants in Ethernet networks? [Choose two.] using the incorrect cable type* half-duplex operations a malfunctioning NIC* electrical interference on serial interfaces CRC errors 11. Which two functions are performed at the LLC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? [Choose two.] places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame* adds Ethernet control information to network protocol data* implements CSMA/CD over legacy shared half-duplex media applies source and destination MAC addresses to Ethernet frame integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper 12. Which two commands could be used to check if DNS name resolution is working properly on a Windows PC? [Choose two.] nslookup cisco.com* ping cisco.com* ipconfig /flushdns net cisco.com nbtstat cisco.com 13. A small advertising company has a web server that provides critical business service. The company connects to the Internet through a leased line service to an ISP. Which approach best provides cost effective redundancy for the Internet connection? Add a second NIC to the web server. Add a connection to the Internet via a DSL line to another ISP.* Add another web server to prepare failover support. Add multiple connections between the switches and the edge router. 14. Only employees connected to IPv6 interfaces are having difficulty connecting to remote networks. The analyst wants to verify that IPv6 routing has been enabled. What is the best command to use to accomplish the task? copy running-config startup-config show interfaces show ip nat translations show running-config* 15. Refer to the exhibit. A network administrator is connecting a new host to the Registrar LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host? Floor[config]# interface gi0/1 Floor[config-if]# description Connects to the Registrar LAN Floor[config-if]# ip address 192.168.235.234 255.255.255.0 Floor[config-if]# no shutdown Floor[config-if]# interface gi0/0 Floor[config-if]# description Connects to the Manager LAN Floor[config-if]# ip address 192.168.234.114 255.255.255.0 Floor[config-if]# no shutdown Floor[config-if]# interface s0/0/0 Floor[config-if]# description Connects to the ISP Floor[config-if]# ip address 10.234.235.254 255.255.255.0 Floor[config-if]# no shutdown Floor[config-if]# interface s0/0/1 Floor[config-if]# description Connects to the Head Office WAN Floor[config-if]# ip address 203.0.113.3 255.255.255.0 Floor[config-if]# no shutdown Floor[config-if]# end 192.168.235.234* 203.0.113.3 192.168.235.1 10.234.235.254 192.168.234.114 16. Match the command with the device mode at which the command is entered. [Not all options are used.] CCNA 1 v7 ITN Practice Final Exam Answers p16 Explanation: The enable command is entered in R1> mode. The login command is entered in R1[config-line]# mode. The copy running-config startup-config command is entered in R1# mode. The ip address 192.168.4.4 255.255.255.0 command is entered in R1[config-if]# mode. The service password-encryption command is entered in global configuration mode. 17. A router boots and enters setup mode. What is the reason for this? The IOS image is corrupt. Cisco IOS is missing from flash memory. The configuration file is missing from NVRAM.* The POST process has detected hardware failure.
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What are switch forwarding methods?
There are 2 methods that all switch use for forwarding the frames [switching data] between the network ports: Store and forward switching. Cut-through switching.
What is frame forwarding in switch?
To forward the frame, the switch examines the destination MAC address and compares it to addresses found in the MAC address table. If the address is in the table, the frame is forwarded out the port associated with the MAC address in the table.
Which networks use store
Message switching network uses the mechanism of store and forward..
Switched communication networks are those in which data transferred from source to destination is routed between various intermediate nodes..
What is an important concept related to the fast forwarding method of switching?
Explanation: Fast-forward switching offers the lowest level of latency and it is the typical cut-through method of switching. Fragment-free switching can be viewed as a compromise between store-and-forward switching and fast-forward switching.