ccna
This command prevents someone from viewing the running configuration passwords
A network administrator enters the service passwordencryption command into the configuration mode of a router. What does this command accomplish? ----------------------------------- This command encrypts passwords as they are transmitted across serial WAN links. This command prevents someone from viewing the running configuration passwords. This command enables a strong encryption algorithm for the enable secret password command. This command automatically encrypts passwords in configuration files that are currently stored in NVRAM. This command provides an exclusive encrypted password for external service personnel who are required to do router maintenance.
DSL
A small business user is looking for an ISP connection that provides high speed digital transmission over regular phone lines. What ISP connection type should be used? -DSL -dial-up -satellite -cell modem -cable modem
mesh
A technician has been asked to develop a physical topology for a network that provides a high level of redundancy. Which physical topology requires that every node is attached to every other node on the network? -------------------------- bus hierarchical mesh ring star
The data flow is being tracked based on the source port number utilized by each application
A technician with a PC is using multiple applications while connected to the Internet. How is the PC able to keep track of the data flow between multiple application sessions and have each application receive the correct packet flows? -------------------------------- The data flow is being tracked based on the destination port number utilized by each application. The data flow is being tracked based on the source port number utilized by each application. The data flow is being tracked based on the source IP address used by the PC of the technician. The data flow is being tracked based on the destination IP address used by the PC of the technician.
Nothing can be determined for sure at this point.
A user reports a lack of network connectivity. The technician takes control of the user machine and attempts to ping other computers on the network and these pings fail. The technician pings the default gateway and that also fails. What can be determined for sure by the results of these tests? ------------------- The NIC in the PC is bad. The TCP/IP protocol is not enabled. The router that is attached to the same network as the workstation is down. Nothing can be determined for sure at this point.
all IPv6 configured routers on the local link
An IPv6 enabled device sends a data packet with the destination address of FF02::2. What is the target of this packet? ----------------------------- all IPv6 enabled devices across the network all IPv6 enabled devices on the local link all IPv6 DHCP servers all IPv6 configured routers on the local link
The transmission continues without the missing portion
An Internet television transmission is using UDP. What happens when part of the transmission is not delivered to the destination? A delivery failure message is sent to the source host. The part of the television transmission that was lost is re-sent. The entire transmission is re-sent. The transmission continues without the missing portion.
client
An author is uploading one chapter document from a personal computer to a file server of a book publisher. What role is the personal computer assuming in this network model? client master server slave transient
link-local
At a minimum, which address is required on IPv6-enabled interfaces? link-local unique local site local global unicast
Ctrl+Shift+6
For Cisco IOS, which escape sequence allows terminating a traceroute operation? Ctrl+Shift+6 Ctrl+Esc Ctrl+x Ctrl+c
2001:db8:0:f000::/52
Given IPv6 address prefix 2001:db8::/48, what will be the last subnet that is created if the subnet prefix is changed to /52? ------------------------------ 2001:db8:0:f00::/52 2001:db8:0:8000::/52 2001:db8:0:f::/52 2001:db8:0:f000::/52
data link
If data is being sent over a wireless network, then connects to an Ethernet network, and eventually connects to a DSL connection, which header will be replaced each time the data travels through a network infrastructure device? ---------------------- Layer 3 data link physical Layer 4
emi, crosstalk
In addition to the cable length, what two factors could interfere with the communication carried over UTP cables? (Choose two.) crosstalk bandwidth size of the network signal modulation technique emi
process the frame as it is
In an Ethernet network, when a device receives a frame of 1200 bytes, what will it do? ---------------------------- drop the frame process the frame as it is send an error message to the sending device add random data bytes to make the frame 1518 bytes long and then forward it
linevtyin
Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator uses Telnet to connect to the switch, which password is needed to access user EXEC mode? -letmein -secretin -lineconin -linevtyin
fe80::30d0:115:3f57:fe4c/128*
Refer to the exhibit. A user issues the command netstat -r on a workstation. Which IPv6 address is one of the link-local addresses of the workstation? ::1/128 fe80::30d0:115:3f57:fe4c/128 fe80::/64 2001:0:9d38:6ab8:30d0:115:3f57:f e4c/128
The administrator must first enter privileged EXEC mode before issuing the command
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? Switch1>config t ^ % Invalid input dectected at '^' marker -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.
172.16.19.255
Refer to the exhibit. An administrator must send a message to everyone on the router A network. What is the broadcast address for network 172.16.16.0/22? ----------------------------------- 172.16.16.255 172.16.20.255 172.16.19.255 172.16.23.255 172.16.255.255
segment
What PDU is associated with the transport layer? ________________________________ segment packet frame bits
LLC,MAC
What are the two sublayers of the OSI model data link layer? (Choose two.) ------------------------------- internet physical LLC transport MAC network access
A,D
What are two features of ARP? (Choose two.) ------------------------------- A-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. B-An ARP request is sent to all devices on the Ethernet LAN and contains the IP address of the destination host and its multicast MAC address. C-When a host is encapsulating a packet into a frame, it refers to the MAC address table to determine the mapping of IP addresses to MAC addresses. D-If no device responds to the ARP request, then the originating node will broadcast the data packet to all devices on the network segment. If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.*
destination MAC address
What important information is examined in the Ethernet frame header by a Layer 2 device in order to forward the data onward? source MAC address source IP address destination MAC address Ethernet type destination IP address
connectionless
What is a basic characteristic of the IP protocol? --------------------------------- connectionless media dependent user data segmentation reliable end-to-end delivery
It is encapsulated in a Layer 2 frame
What is done to an IP packet before it is transmitted over the physical medium? --------------------------------- It is tagged with information guaranteeing reliable delivery. It is segmented into smaller individual pieces. It is encapsulated into a TCP segment. It is encapsulated in a Layer 2 frame.
discovery and mapping of systems
What is the objective of a network reconnaissance attack? --------------------------------- discovery and mapping of systems unauthorized manipulation of data disabling network systems or services denying access to resources by legitimate users
to provide feedback of IP packet transmissions
What is the purpose of ICMP messages? -------------------------- to inform routers about network topology changes to ensure the delivery of an IP packet to provide feedback of IP packet transmissions to monitor the process of a domain name to IP address resolution
The SVI provides a virtual interface for remote access to the switch
What is the purpose of the SVI on a Cisco switch? -The SVI provides a physical interface for remote access to the switch. -The SVI provides a faster method for switching traffic between ports on the switch. -The SVI adds Layer 4 connectivity between VLANs. -The SVI provides a virtual interface for remote access to the switch
62
What is the usable number of host IP addresses on a network that has a /26 mask? ------------------------------ 256 254 64 62 32 16
2001:DB8:0:AB00::1234
What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234? 2001:DB8:0:AB00::1234 2001:DB8:0:AB::1234 2001:DB8::AB00::1234 2001:DB8:0:AB:0:1234
Flow Control, Error Recovery, Connection establishment
What three services are provided by the transport layer? (Choose three.) flow control encryption of data path determination connection establishment error recovery bit transmission data representation
radio waves
What type of communication medium is used with a wireless LAN connection? ----------------- fiber radio waves microwave UTP
access method
What type of communication rule would best describe CSMA/CD? access method* flow control message encapsulation message encoding
It initiates an ARP request. It broadcasts the frame out of all ports on the switch. It notifies the sending host that the frame cannot be delivered. It forwards the frame out of all ports except for the port at which the frame was received.
What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table? It initiates an ARP request. It broadcasts the frame out of all ports on the switch. It notifies the sending host that the frame cannot be delivered. It forwards the frame out of all ports except for the port at which the frame was received.
All login attempts will be blocked for 150 seconds if there are 4 failed attempts within 90 seconds.
What will be the result of failed login attempts if the following command is entered into a router? ----------------------------- login block-for 150 attempts 4 within 90 All login attempts will be blocked for 150 seconds if there are 4 failed attempts within 90 seconds. All login attempts will be blocked for 90 seconds if there are 4 failed attempts within 150 seconds. All login attempts will be blocked for 1.5 hours if there are 4 failed attempts within 150 seconds. All login attempts will be blocked for 4 hours if there are 90 failed attempts within 150 seconds.
during times of peak utilization
When a network administrator is trying to manage network traffic on a growing network, when should traffic flow patterns be analyzed? ---------------------------- during times of peak utilization during off-peak hours during employee holidays and weekends during randomly selected times
broadcast
Which message delivery option is used when all devices need to receive the same message simultaneously? ---------------------------------- duplex unicast multicast broadcast
It identifies the routers in the path from a source host to a destination host
Which statement describes a characteristic of the traceroute utility? It sends four Echo Request messages. It utilizes the ICMP Source Quench messages. It is primarily used to test connectivity between two hosts. It identifies the routers in the path from a source host to a destination host.
extranet
Which term refers to a network that provides secure access to the corporate offices by suppliers, customers and collaborators? -Internet -intranet -extranet -extendednet
presentation, session
Which two OSI model layers are considered to be included in the top layer of the TCP/IP protocol stack? (Choose two.) internet network presentation session transport
subnet mask, Default gateway
Which two automatic addressing assignments are supported by DHCP? (Choose two.) local server address subnet mask default gateway address physical address of the recipient physical address of the sender
ICMP,IP
Which two protocols function at the internet layer? (Choose two.) --------------------- POP BOOTP ICMP IP PPP
DNS,DHCP
Which two services are required to enable a computer to receive dynamic IP addresses and access the Internet using domain names? (Choose two.) ------------------------ DNS WINS HTTP DCHP SMTP
ROM is nonvolatile and contains basic diagnostic software. RAM is volatile and stores the IP routing table.
Which two statements correctly describe a router memory type and its contents? (Choose two.) ROM is nonvolatile and stores the running IOS. FLASH is nonvolatile and contains a limited portion of the IOS. RAM is volatile and stores the IP routing table. NVRAM is nonvolatile and stores a full version of the IOS. ROM is nonvolatile and contains basic diagnostic software.