CCNA Practice Test
Match terms to definitions
A GUI, or graphical user interface, allows the user to interact with the operating system by pointing and clicking at elements on the screen. A CLI, or command-line interface, requires users to type commands at a prompt in order to interact with the OS. The shell is the part of the operating system that is closest to the user. The kernel is the part of the operating system that interfaces with the hardware.
What type of communication medium is used with a wireless LAN connection?
A wired LAN connection commonly uses UTP. A wireless LAN connection uses radio waves.
What type of communication rule would best describe CSMA/CD?
Carrier sense multiple access collision detection (CSMA/CD) is the access method used with Ethernet. The access method rule of communication dictates how a network device is able to place a signal on the carrier. CSMA/CD dictates those rules on an Ethernet network and CSMA/CA dictates those rules on an 802.11 wireless LAN.
In addition to the cable length, what two factors could interfere with the communication carried over UTP cables?
Copper media is widely used in network communications. However, copper media is limited by distance and signal interference. Data is transmitted on copper cables as electrical pulses. The electrical pulses are susceptible to interference from two sources: •Electromagnetic interference (EMI) or radio frequency interference (RFI) - EMI and RFI signals can distort and corrupt the data signals being carried by copper media. •Crosstalk - Crosstalk is a disturbance caused by the electric or magnetic fields of a signal on one wire interfering with the signal in an adjacent wire.
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
Which two protocols function at the internet layer?
ICMP and IP both function at the internet layer, whereas PPP is a network access layer protocol, and POP and BOOTP are application layer protocols.
A user issues the command netstat -r on a workstation. Which IPv6 address is one of the link-local addresses of the workstation?
In the IPv6 address scheme, the network of fe80::/10 is reserved for link-local addresses. The address fe80::/64 is a network address that indicates, in this workstation, fe80::/64 is actually used for link-local addresses. Thus the address fe80::30d0:115:3f57:fe4c/128 is a valid IPv6 link-local address.
Given IPv6 address prefix 2001:db8::/48, what will be the last subnet that is created if the subnet prefix is changed to /52?
Prefix 2001:db8::/48 has 48 network bits. If we subnet to a /52, we are moving the network boundary four bits to the right and creating 16 subnets. The first subnet is 2001:db8::/52 the last subnet is 2001:db8:0:f000::/52.
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?
The 172.16.16.0/22 network has 22 bits in the network portion and 10 bits in the host portion. Converting the network address to binary yields a subnet mask of 255.255.252.0. The range of addresses in this network will end with the last address available before 172.16.20.0. Valid host addresses for this network range from 172.16.16.1-172.16.19.254, making 172.16.19.255 the broadcast address.
Which keys act as a hot key combination that is used to interrupt an IOS process?
The Cisco IOS provides both hot keys and shortcuts for configuring routers and switches. The Ctrl-Shift-6 hot key combination is used to interrupt an IOS process, such as a ping or traceroute. Ctrl-Z is used to exit the configuration mode. Ctrl-C aborts the current command. Ctrl-Shift-X has no IOS function.
What is the purpose of the SVI on a Cisco switch?
The SVI is a virtual, not physical, interface that provides remote access to the switch. It does not impact Layer 4 nor does it enhance switching between switch ports on the switch.
Which term refers to a network that provides secure access to the corporate offices by suppliers, customers and collaborators?
The term Internet refers to the worldwide collection of connected networks. Intranet refers to a private connection of LANs and WANS that belong to an organization and is designed to be accessible to the members of the organization, employees, or others with authorization. Extranets provide secure and safe access to suppliers, customers, and collaborators. Extendednet is not a type of network.
three major phases to the bootup process of a Cisco router:
There are three major phases to the bootup process of a Cisco router:1.Perform the POST and load the bootstrap program. 2.Locate and load the Cisco IOS software. 3.Locate and load the startup configuration file If a startup configuration file cannot be located, the router will enter setup mode by displaying the setup mode prompt.
What three blocks of addresses are defined by RFC 1918 for private network use?
•10.0.0.0/8 •172.16.0.0/12 •192.168.0.0/16
