Intro to Networks-Cisco
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Intro to Networks-Cisco - Marcador
Intro to Networks-Cisco - Detalles
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132 preguntas
| 🇬🇧 | 🇬🇧 |
| What happens when the transport input ssh command is entered on the switch vty lines? | Communication between the switch and remote users is encrypted. |
| What is the subnet ID associated with the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64? | 2001:DA48:FC5:A4::/64 |
| 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. |
| 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. |
| Refer to the exhibit. What is wrong with the displayed termination? | The untwisted length of each wire is too long |
| 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 UDP destination port number identifies the application or service on the server which will handle the data -UDP segments are encapsulated within IP packets for transport across the network. -The source port field identifies the running application or service that will handle data returning to the PC. |
| TCP/UDP | TCP-FTP, HTTP, SMTP UDP-DHCP, TFTP |
| What two pieces of information are displayed in the output of the show ip interface brief command? (Choose two.) | IP addresses Layer 1 statuses |
| 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? (Choose three.) | -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? (Choose two.) | -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? (Choose two.) | -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? (Choose two.) | 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. |
| What are two common causes of signal degradation when using UTP cabling? (Choose two.) | Low quality cable or connectors |
| 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. |
| What is the consequence of configuring a router with the ipv6 unicast-routing global configuration command? | The IPv6 enabled router interfaces begin sending ICMPv6 Router Advertisement messages. |
| 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? (Choose three.) | Application Session Presentation |
| 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? (Choose two.) | Capture traffic during peak utilization times to get a good representation of the different traffic types. Perform the capture on different network segments. |
| 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-ab Layer 2 source address = 00-00-0c-94-36-bb Layer 3 destination address = 172.16.20.200 Layer 3 source address = 172.16.10.200 |
| What are two problems that can be caused by a large number of ARP request and reply messages? (Choose two.) | A large number of ARP request and reply messages may slow down the switching process, leading the switch to make many changes in its MAC table. The ARP request is sent as a broadcast, and will flood the entire subnet. |
| Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.) | Integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper implements CSMA/CD over legacy shared half-duplex media |
| 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. |
| Which two statements are correct in a comparison of IPv4 and IPv6 packet headers? (Choose two.) | The Time-to-Live field from IPv4 has been replaced by the Hop Limit field in IPv6. The Source Address field name from IPv4 is kept in IPv6. |
| Which two statements accurately describe an advantage or a disadvantage when deploying NAT for IPv4 in a network? (Choose two.) | NAT provides a solution to slow down the IPv4 address depletion. NAT introduces problems for some applications that require end-to-end connectivity. |
| What service is provided by HTTP? | A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web. |
| What service is provided by HTTP? | A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web. |
| What are the two most effective ways to defend against malware? (Choose two.) | Update the operating system and other application software. Install and update antivirus software. |
| An administrator defined a local user account with a secret password on router R1 for use with SSH. Which three additional steps are required to configure R1 to accept only encrypted SSH connections? (Choose three.) | Enable inbound vty SSH sessions. Generate the SSH keys. Configure the IP domain name on the router. |
| A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in its ARP cache. How will the device obtain a destination MAC address? | It will send an ARP request for the MAC address of the default gateway. |
| What are proprietary protocols? | Protocols developed by organizations who have control over their definition and operation |
| What is an advantage to using a protocol that is defined by an open standard? | It encourages competition and promotes choices. |
| What would be the interface ID of an IPv6 enabled interface with a MAC address of 1C-6F-65-C2-BD-F8 when the interface ID is generated by using the EUI-64 process? | 1E6F:65FF:FEC2:BDF8 |
| Which information does the show startup-config command display? | The contents of the saved configuration file in the NVRAM |
| What are two primary responsibilities of the Ethernet MAC sublayer? (Choose two.) | Accessing the media data encapsulation |
| Which switching method drops frames that fail the FCS check? | Store-and-forward switching |
| What is an advantage for small organizations of adopting IMAP instead of POP? | Messages are kept in the mail servers until they are manually deleted from the email client. |
| What are two characteristics shared by TCP and UDP? (Choose two.) | Port numbering use of checksum |
| What service is provided by Internet Messenger? | An application that allows real-time chatting among remote users. |
| What characteristic describes antispyware? | Applications that protect end devices from becoming infected with malicious software |
| Which two statements describe features of an IPv4 routing table on a router? (Choose two.) | Directly connected interfaces will have two route source codes in the routing table: C and S . If a default static route is configured in the router, an entry will be included in the routing table with source code S . |
| What is the consequence of configuring a router with the ipv6 unicast-routing global configuration command? | The IPv6 enabled router interfaces begin sending ICMPv6 Router Advertisement messages. |
| Refer to the exhibit. If Host1 were to transfer a file to the server, what layers of the TCP/IP model would be used? | Application, transport, Internet, and network access layers |
| The global configuration command ip default-gateway 172.16.100.1 is applied to a switch. What is the effect of this command? | The switch can be remotely managed from a host on another network. |
| What characteristic describes adware? | Software that is installed on a user device and collects information about the user |
| What is the purpose of the TCP sliding window? | To request that a source decrease the rate at which it transmits data |
| What technique is used with UTP cable to help protect against signal interference from crosstalk? | Twisting the wires together into pairs |
| A network technician is researching the use of fiber optic cabling in a new technology center. Which two issues should be considered before implementing fiber optic media? (Choose two.) | Fiber optic cabling requires different termination and splicing expertise from what copper cabling requires Fiber optic provides higher data capacity but is more expensive than copper cabling. |
| Refer to the exhibit. PC1 issues an ARP request because it needs to send a packet to PC2. In this scenario, what will happen next? | PC2 will send an ARP reply with its MAC address. |
| An IPv6 enabled device sends a data packet with the destination address of FF02::2. What is the target of this packet? | All IPv6 configured routers on the local link |
| What are the three parts of an IPv6 global unicast address? (Choose three.) | Subnet ID global routing prefix interface ID |
| What is one main characteristic of the data link layer? | It shields the upper layer protocol from being aware of the physical medium to be used in the communication. |