Practice Test For CCENT Certification Exam

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Plenum cable is a type of cable designed for use in plenum spaces, which are areas used for air circulation in buildings. It is not a specific type of network cable like coaxial, twisted-pair, or fiber-optic.

Using SSH to connect to a router allows for a secure remote connection to the router's command line interface. This means that administrators can access and configure the router's settings and commands from a remote location, ensuring that the connection is encrypted and secure. This is important for maintaining the confidentiality and integrity of the network, as it prevents unauthorized access and potential security breaches.

A router is the device that connects a local LAN to a geographically separate network. Routers are responsible for directing network traffic between different networks, such as connecting a home or office network to the internet. They use routing tables to determine the best path for data packets to travel from one network to another. Unlike switches and hubs, which are used to connect devices within a local network, routers are specifically designed to connect networks together. Bridges are also used to connect networks, but they are typically used within a local network to divide it into smaller segments.

The purpose of the "crypto key generate rsa" command when configuring a switch to use SSH for virtual terminal connections is to create a public and private key pair. This key pair is used for secure communication between the switch and the SSH clients. The public key is shared with the clients to encrypt the data, while the private key is kept securely on the switch to decrypt the data. This ensures that the communication between the switch and the clients is encrypted and secure.

The error message indicates that a port security violation occurred on switch port Fa0/8. This means that an unauthorized connection was made to the switch through this port, triggering the port security feature to put the port into an err-disable state. This feature is used to restrict access to a network by allowing only specific MAC addresses to connect to a port. In this case, the MAC address 0011.a0d4.12a0 was detected as the unauthorized connection, causing the error message to appear and the port to be disabled.

The network layer of the OSI model defines logical addressing. This layer is responsible for routing and forwarding data packets between different networks. It assigns logical addresses to devices on the network, allowing them to communicate with each other. The network layer also determines the best path for data transmission and handles any necessary address translation.

Switch port security is the best solution to ensure that unauthorized laptops are not connected to the wired network. Switch port security allows the network administrator to restrict access to specific MAC addresses, preventing unauthorized devices from connecting to the network. By implementing switch port security, the company can control which devices are allowed to connect to the network, increasing network security and preventing unauthorized access.

From the output of the ping command, we can determine that one packet timed out and four packets of data were successfully received.

The packets will be sent to Router1 and dropped because private addresses are not transmitted across the Internet. This means that the packets with the source and destination IP addresses of 192.168.1.88 and 172.16.0.3 respectively will not be able to pass through Router1 and reach the destination. Private IP addresses are not routable on the public Internet, so Router1 will drop the packets.

The correct answer is "RouterA(config)# enable secret cisco" because the "enable secret" command is used to create an encrypted password that restricts access to the privileged EXEC mode of a Cisco router. This command encrypts the password using the MD5 algorithm and provides a higher level of security compared to the "enable password" command.

The Layer 2 destination address of the frame as it leaves the myhome router is 0008.a3b6.ce05.

WPA2 uses the Advanced Encryption Standard (AES) as its security method. AES is a widely used encryption algorithm that provides a high level of security for wireless networks. It is considered to be one of the most secure encryption methods available and is used to encrypt data transmitted over a wireless network to prevent unauthorized access and protect the confidentiality of the information.

When Host A needs to communicate with Host D but does not have the MAC address for its default gateway, it sends an Address Resolution Protocol (ARP) request. This request is broadcasted to all hosts on the network. In this scenario, only Hosts B and C, along with the router R1, will receive the ARP request. This is because the ARP request is sent to all hosts within the same broadcast domain, which includes Hosts B and C, as well as the router R1. Host D will not receive the ARP request as it is not on the same broadcast domain as Host A.

The given IP address is in the format of a Class C network, with a subnet mask of /20. This means that the network can have a maximum of 4094 hosts, including the network and broadcast addresses. Since there is already one network host with the given IP address, the remaining number of network devices that can be added is 4093.

Static NAT allows a host on a public network to have consistent access to a specified private inside host. With static NAT, a specific private IP address is mapped to a specific public IP address, allowing the inside host to be consistently accessible from the public network. This type of NAT is commonly used for servers that need to be accessed from the internet, such as web servers or email servers.

The technician should expect to see the line "enable secret 5 $1$v0/3$QyQWmJyT7zCa/yaBRasJm0 enable password 7 14141E0A1F17 line console 0 password 7 020507550A" in the router output from the show running-config command. This line includes the enable secret password and enable password in encrypted format, as well as the console line password in encrypted format. This indicates that the configuration for these passwords has been successfully applied to the router.

The cause of the problem is that the IP address assigned to the server is in an incorrect subnet. This means that the server's IP address does not fall within the same range of IP addresses as the other devices in the network. As a result, the server and the other hosts are not able to communicate with each other.

The correct answer is Router(config)# line vty 0 4 Router(config-line)# login Router(config-line)# password cisco. This command sequence configures the virtual terminal lines on the Denver router to allow remote access. The "line vty 0 4" command specifies the range of virtual terminal lines to configure, while the "login" command enables login authentication. The "password cisco" command sets the password for remote access.

A CSU/DSU (Channel Service Unit/Data Service Unit) is needed to connect the office router to the ISP if the service provider supplies a T1 line for the connection. A CSU/DSU is a device that converts the digital data from the router into a format that can be transmitted over the T1 line. It also provides the necessary clocking and synchronization signals for the connection. This device is specifically designed for T1 connections and is commonly used in WAN setups.

WEP (Wired Equivalent Privacy) is a security protocol used to encrypt data transmitted over a wireless network. It provides a level of confidentiality by encoding the information, making it unreadable to unauthorized users. This encryption ensures that the data remains secure and protected from interception or tampering.

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When host A sends an IP packet to host B, the destination address in the frame when it leaves host A will be BB:BB:BB:BB:BB:BB.

The correct set of commands will allow the network administrator to telnet to RouterB to check its status. The "enable secret class" command sets the enable password to "class" for privileged mode access. The "line vty 0" command configures the virtual terminal lines for remote access. The "password cisco" command sets the password for telnet access. The "login" command enables login authentication for telnet access.

EIGRP (Enhanced Interior Gateway Routing Protocol) is described as an enhanced distance vector routing protocol. It combines the features of both distance vector and link-state protocols, making it more efficient and scalable. EIGRP uses a metric called "composite metric" to calculate the best path for routing and updates its routing table based on the distance and reliability of the routes. It also supports load balancing and faster convergence compared to traditional distance vector protocols like RIP. Therefore, EIGRP is the correct answer for the question.

In full-duplex mode, there are no collisions because data can be transmitted and received simultaneously. A dedicated switch port is required for each node to enable full-duplex communication. The host network card and the switch port must both be in full-duplex mode to ensure proper communication. Hub ports are not preconfigured for full-duplex mode. The host network card does not need to detect media availability before transmitting in full-duplex mode.

The correct answer is Router(config)# hostname South South(config)# exit South# copy running-config startup-config. This set of commands is used to name a router and save the configuration. The "hostname" command is used to assign a name to the router, in this case "South". The "exit" command is used to exit the configuration mode. Finally, the "copy running-config startup-config" command is used to save the configuration to the startup-config file.

UDP provides connectionless, fast transport of data at Layer 4. This means that UDP does not establish a connection before sending data and does not guarantee the delivery of data. It is a lightweight protocol that operates at the transport layer and is faster than TCP. UDP relies on application layer protocols for error detection, as it does not have built-in error detection mechanisms. It is suitable for applications that can tolerate some data loss, such as streaming media or real-time communication. UDP does not rely on IP for error detection and recovery, as it operates independently at the transport layer.

TCP (Transmission Control Protocol) uses sequence numbers in segments to ensure reliable data delivery. Each segment is assigned a unique sequence number, allowing the receiver to identify missing segments and request retransmission. Additionally, sequence numbers enable the receiver to reassemble the segments in the correct order, ensuring that the data is received as intended.

RAM (Random Access Memory) is the correct answer because it is a type of computer memory that is used to store data and instructions that are currently being used by the router. It holds the routing table, which is used by the router to determine the best path for forwarding packets, the ARP (Address Resolution Protocol) cache, which is used to map IP addresses to MAC addresses, and the running configuration file, which contains the current configuration settings for the router. RAM is volatile memory, meaning that its contents are lost when the router is powered off or restarted.

ROM (Read-Only Memory) in a router has the function of maintaining instructions for POST (Power-On Self-Test) diagnostics. These instructions are used to perform diagnostic tests on the router's hardware during the boot-up process to ensure that all components are functioning properly. ROM also stores the bootstrap program, which is responsible for initializing the router's hardware and loading the operating system. This program is essential for the router to start up and function correctly. Therefore, ROM in a router maintains instructions for POST diagnostics and stores the bootstrap program.

Disabling CDP (Cisco Discovery Protocol) on the R1 interface that connects to R2 is the appropriate security measure to prevent the Site 2 R2 router from accessing information about the HQ R1 router model and IP address. CDP is a Cisco proprietary protocol that allows devices to share information about themselves, including their model and IP address. By disabling CDP on the interface, the R1 router will not advertise this information to the R2 router, ensuring its security.

The administrator will need to use the password "cisco" to enter privileged EXEC mode on this device.

802.11a is a valid standards-based wireless NIC but will not work in an environment with an 802.11b wireless access point. This is because 802.11a operates on a different frequency band (5 GHz) compared to 802.11b (2.4 GHz). Therefore, the 802.11a NIC will not be able to communicate with the 802.11b access point, resulting in compatibility issues.

The initial configuration of Cisco routers using the IOS command-line interface requires two items: a rollover cable and terminal emulation software. A rollover cable is used to connect the router's console port to a computer's serial port, allowing for configuration and management of the router. Terminal emulation software is needed to establish a connection between the computer and the router, enabling the user to access and configure the router through the command-line interface.

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The "inside global" addresses are the addresses that are used on the outside network. In this case, the addresses 198.133.219.35 and 198.133.219.44 are the only ones that are not in the private IP address range (192.168.x.x). Therefore, they are the "inside global" addresses.

From the exhibited output, two facts can be determined about the network. First, the Negril router is connected to the S0/1 interface of the MontegoBay router. Second, layer 2 is operational on three ports of the MontegoBay router.

The broadcast address is the highest address in a network and is used to send data to all devices on that network. In this question, the broadcast address for the subnetwork on which host A resides is 10.159.255.255. This is because it is the highest address among the given options and falls within the same network range as host A's IP address.

The ROM memory component contains diagnostic self test procedures that are executed on hardware modules, ensuring the proper functioning of the router. On the other hand, flash memory is non-volatile, meaning it does not lose its contents when the router is powered off. This makes it an ideal location to store the boot system commands that identify the location of the IOS.

The first statement is correct because the command "ip route 192.168.7.24 255.255.255.248 192.168.7.9" specifies that any packet destined for host 192.168.7.30 should be forwarded to the next-hop address 192.168.7.9.

The fifth statement is also correct because the command "ip route" is used to define a static route, which is a manually configured route that remains in the routing table until it is manually removed or the device is restarted.

The correct answer is 172.16.28.0/22. This is because the destination address of 172.16.30.79 falls within the range of the subnet 172.16.28.0/22. The /22 subnet mask indicates that the first 22 bits of the IP address are used to identify the network, while the remaining 10 bits are used for host addresses. Therefore, any IP address within the range of 172.16.28.0 to 172.16.31.255 belongs to this subnet.

During the boot process, a router can load the Cisco IOS from two locations: TFTP server and Flash memory. The TFTP server is a network device that stores the IOS image and can be accessed by the router over the network. Flash memory, on the other hand, is a type of non-volatile memory in the router itself where the IOS image can be stored. These two locations provide the router with the necessary IOS image to boot up and operate.

The packet would be dropped because there is no specific route configured for the destination IP address 10.0.2.2 on Switch1. Since routing between networks is functioning properly, Switch1 would attempt to send the packet to the default gateway (Router1) for further routing. However, since there is no specific route for the destination IP address on Router1 either, the packet would be dropped.

A network administrator can modify the startup configuration file on a router to specify the location from which the Cisco IOS loads. This file contains the configuration settings for the router and can be modified to specify the location of the IOS image file. Additionally, the administrator can modify the configuration register value on the router, which determines the boot behavior and can be used to specify the location of the IOS image file. By modifying these two settings, the administrator can control where the router loads the IOS from.

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The first reason for the failure could be that the Jax router does not have an entry for Atlanta in its host table. This means that the Jax router does not have the necessary information to establish a connection with the Atlanta router.

The second reason could be that access to a DNS server is not available. Without access to a DNS server, the Jax router would not be able to resolve the hostname "Atlanta" to its corresponding IP address, preventing the Telnet connection from being established.