CSC151 Final - CCNA 1 7.02 2023-2024 test questions and answers

A client packet is received by a server. The packet has a destination port number of 143. What service is the client requesting? IMAP 3 MULTIPLE CHOICE OPTIONS Which two functions are performed at the MAC 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 3 MULTIPLE CHOICE OPTIONS Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? adds Ethernet control information to network protocol data implements CSMA/CD over legacy shared half-duplex media 3 MULTIPLE CHOICE OPTIONS Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? implements trailer with frame check sequence for error detection adds Ethernet control information to network protocol data 3 MULTIPLE CHOICE OPTIONS A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured? Exit privileged EXEC mode and press Enter. 3 MULTIPLE CHOICE OPTIONS What happens when the transport input ssh command is entered on the switch vty lines? Communication between the switch and remote users is encrypted. 3 MULTIPLE CHOICE OPTIONS What is the subnet ID associated with the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64? 2001:DA48:FC5:A4::/64​ 3 MULTIPLE CHOICE OPTIONS A client is using SLAAC to obtain an IPv6 address for its interface. After an address has been generated and applied to the interface, what must the client do before it can begin to use this IPv6 address? It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network. 3 MULTIPLE CHOICE OPTIONS Which range of link-local addresses can be assigned to an IPv6-enabled interface?​ FE80::/10 3 MULTIPLE CHOICE OPTIONS What mechanism is used by a router to prevent a received IPv4 packet from traveling endlessly on a network? It decrements the value of the TTL field by 1 and if the result is 0, it discards the packet and sends a Time Exceeded message to the source host. 3 MULTIPLE CHOICE OPTIONS A network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network? security interference coverage area Refer to the exhibit. What is wrong with the displayed termination? The untwisted length of each wire is too long A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment. Which two factors may interfere with the copper cabling and result in signal distortion and data corruption? EMI RFI 3 MULTIPLE CHOICE OPTIONS Data is being sent from a source PC to a destination server. Which three statements correctly describe the function of TCP or UDP in this situation? (Choose three.) The source port field identifies the running application or service that will handle data returning to the PC. UDP segments are encapsulated within IP packets for transport across the network. The UDP destination port number identifies the application or service on the server which will handle the data. TCP PROTOCOLS FTP HTTP SMTP UDP PROTOCOLS DCHP TFTP A group of Windows PCs in a new subnet has been added to an Ethernet network. When testing the connectivity, a technician finds that these PCs can access local network resources but not the Internet resources. To troubleshoot the problem, the technician wants to initially confirm the IP address and DNS configurations on the PCs, and also verify connectivity to the local router. Which three Windows CLI commands and utilities will provide the necessary information? ping ipconfig nslookup What two pieces of information are displayed in the output of the show ip interface brief command? IP addresses Layer 1 statuses A network administrator is adding a new LAN to a branch office. The new LAN must support 25 connected devices. What is the smallest network mask that the network administrator can use for the new network? 255.255.255.224 Which frame field is created by a source node and used by a destination node to ensure that a transmitted data signal has not been altered by interference, distortion, or signal loss? frame check sequence field What is a function of the data link layer? provides for the exchange of frames over a common local media What are three characteristics of the CSMA/CD process? After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired. All of the devices on a segment see data that passes on the network medium A device listens and waits until the media is not busy before transmitting. What characteristic describes a Trojan horse? malicious software or code running on an end device What three requirements are defined by the protocols used in network communcations to allow message transmission across a network? (Choose three.) message encoding delivery options message size What are two features of ARP? If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply. If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast. Refer to the exhibit. An administrator is trying to configure the switch but receives the error message that is displayed in the exhibit. What is the problem? The administrator must first enter privileged EXEC mode before issuing the command. Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct? There are 4 hops between this device and the device at 192.168.100.1. There is connectivity between this device and the device at 192.168.100.1. What are two characteristics of IP? does not require a dedicated end-to-end connection operates independently of the network media What will happen if the default gateway address is incorrectly configured on a host? The host cannot communicate with hosts in other networks. Users report that the network access is slow. After questioning the employees, the network administrator learned that one employee downloaded a third-party scanning program for the printer. What type of malware might be introduced that causes slow performance of the network? worm A company has a file server that shares a folder named Public. The network security policy specifies that the Public folder is assigned Read-Only rights to anyone who can log into the server while the Edit rights are assigned only to the network admin group. Which component is addressed in the AAA network service framework? authorization What are two common causes of signal degradation when using UTP cabling? low-quality cable or connectors improper termination Which scenario describes a function provided by the transport layer? A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window. Which two protocols operate at the top layer of the TCP/IP protocol suite? POP DNS An employee of a large corporation remotely logs into the company using the appropriate username and password. The employee is attending an important video conference with a customer concerning a large sale. It is important for the video quality to be excellent during the meeting. The employee is unaware that after a successful login, the connection to the company ISP failed. The secondary connection, however, activated within seconds. The disruption was not noticed by the employee or other employees.What three network characteristics are described in this scenario? (Choose three.) quality of service fault tolerance SECURITY Refer to the exhibit. If PC1 is sending a packet to PC2 and routing has been configured between the two routers, what will R1 do with the Ethernet frame header attached by PC1? remove the Ethernet header and configure a new Layer 2 header before sending it out S0/0/0 Which three layers of the OSI model map to the application layer of the TCP/IP model? application presentation session private address 172.19.20.5 loop back address 127.0.0.1 experiemental address 240.2.6.255 a test-net address 192.0.2.123 a link local address 169.254.1.5 What does the term “attenuation” mean in data communication? loss of signal strength as distance increases Which two statements describe how to assess traffic flow patterns and network traffic types using a protocol analyzer? Capture traffic during peak utilization times to get a good representation of the different traffic types. Perform the capture on different network segments. Refer to the exhibit. Host B on subnet Teachers transmits a packet to host D on subnet Students. Which Layer 2 and Layer 3 addresses are contained in the PDUs that are transmitted from host B to the router? Layer 2 destination address = 00-00-0c-94-36-abLayer 2 source address = 00-00-0c-94-36-bbLayer 3 destination address = 172.16.20.200Layer 3 source address = 172.16.10.200 Which subnet would include the address 192.168.1.96 as a usable host address? 192.168.1.64/26 What are two problems that can be caused by a large number of ARP request and reply messages? The ARP request is sent as a broadcast, and will flood the entire subnet. All ARP request messages must be processed by all nodes on the local network. Why would a Layer 2 switch need an IP address? to enable the switch to be managed remotely How does the service password-encryption command enhance password security on Cisco routers and switches? It encrypts passwords that are stored in router or switch configuration files.