ccna 1

Which domain name would be an example of a top-level domain?

.com

What are the three ranges of IP addresses that are reserved for internal private use?

10.0.0.0/8, 192.168.0.0/16, 172.16.0.0/12

Which subnet would include the address 192.168.1.96 as a usable host address?

192.168.1.64/26

What is the most compressed representation of the IPv6 address 2001:0000:0000:abcd:0000:0000:0000:0001?

2001:0:0:abcd::1

What is the dotted decimal representation of the IPv4 address 11001011.00000000.01110001.11010011?

203.0.113.211

A site administrator has been told that a particular network at the site must accommodate 126 hosts. Which subnet mask would be used that contains the required number of host bits?

25.255.255.128

How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?

62

What are three characteristics of multicast transmission?

A single packet can be sent to a group of hosts, and Multicast transmission can be used by routers to exchange routing information amd Routers will not forward multicast addresses in the range of 224.0.0.0 to 224.0.0.255.

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 method is used to manage contention-based access on a wireless network?

CSMA/CA

A wireless host needs to request an IP address. What protocol would be used to process the request?

DHCP

A user is unable to reach the web site when typing http://www.cisco.com in a web browser, but can reach the same site by typing http://72.163.4.161. What is the issue?

DNS

A home 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 range of link-local addresses can be assigned to an IPv6-enabled interface?

FE80::/10

What are two benefits of using a layered network model?

It assists in protocol design and It prevents technology in one layer from affecting other layers.

What function does pressing the Tab key have when entering a command in IOS?

It completes the remainder of a partially typed word in a command.

What purpose does NAT64 serve in IPv6?

It converts IPv6 packets into IPv4 packets

What is an advantage to using a protocol that is defined by an open standard?

It encourages competition and promotes choices.

What is the function of the shell in an OS?

It interfaces between the users and the kernel.

What are two characteristics of fiber-optic cable?

It is not affected by EMI or RFI and It is more expensive than UTP cabling is.

What is a characteristic of the LLC sublayer?

It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media

What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?

It will discard the frame.

What unique address is embedded in an Ethernet NIC and used for communication on an Ethernet network?

MAC address

What is a benefit of using cloud computing in networking?

Network capabilities are extended without requiring investment in new infrastructure, personnel, or software

Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?

Segments are sent from the transport layer to the internet layer.

What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?

TCP

A PC obtains its IP address from a DHCP server. If the PC is taken off the network for repair, what happens to the IP address configuration?

The address is returned to the pool for reuse when the lease expires.

A network technician is attempting to configure an interface by entering the following command: SanJose(config)# ip address 192.168.2.1 255.255.255.0. The command is rejected by the device. What is the reason for this?

The command is being entered from the wrong mode of operation

What is one indication that a Windows computer did not receive an IPv4 address from a DHCP server?

The computer receives an IP address that starts with 169.254.

After making configuration changes on a Cisco switch, a network administrator issues a copy running-config startup-config command. What is the result of issuing this command?

The new configuration will be loaded if the switch is restarted.

Which statement is true about variable-length subnet masking?

The size of each subnet may be different, depending on requirements

What are two characteristics of Ethernet MAC addresses?

They are globally unique, They are expressed as 12 hexadecimal digits.

On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?

VLAN 1

A company is expanding its business to other countries. All branch offices must remain connected to corporate headquarters at all times. Which network technology is required to support this requirement?

WAN

What is a characteristic of a fault tolerant network?

a network that recovers quickly when a failure occurs and depends on redundancy to limit the impact of a failure

Which connection provides a secure CLI session with encryption to a Cisco switch?

an SSH connection

Three bank employees are using the corporate network. The first employee uses a web browser to view a company web page in order to read some announcements. The second employee accesses the corporate database to perform some financial transactions. The third employee participates in an important live audio conference with other corporate managers in branch offices. If QoS is implemented on this network, what will be the priorities from highest to lowest of the different data types?

audio conference, financial transactions, web page

How does quality of service help a network support a wide range of applications and services?

by providing mechanisms to manage congested network traffic

What is a characteristic of UTP cabling?

cancellation

Which two tasks are functions of the presentation layer?

compression and encryption

Where are Cisco IOS debug output messages sent by default?

console line

What are the three primary functions provided by Layer 2 data encapsulation?

data link layer addressing, detection of errors through CRC calculations delimiting groups of bits into frames

What are the three primary functions provided by Layer 2 data encapsulation?

data link layer addressing, detection of errors through CRC calculations, and delimiting groups of bits into frames

What addresses are mapped by ARP?

destination MAC address to a destination IPv4 address

If a device receives an Ethernet frame of 60 bytes, what will it do?

drop the frame

Which switching method has the lowest level of latency?

fast-forward

What layer is responsible for routing messages through an internetwork in the TCP/IP model?

internet

When applied to a router, which command would help mitigate brute-force password attacks against the router?

login block-for 60 attempts 5 within 60

Which example of malicious code would be classified as a Trojan horse?

malware that was written to look like a video game

Which two OSI model layers have the same functionality as two layers of the TCP/IP model?

network and transport

A technician can ping the IP address of the web server of a remote company but cannot successfully ping the URL address of the same web server. Which software utility can the technician use to diagnose the problem?

nslookup

A network team is comparing physical WAN topologies for connecting remote sites to a headquarters building. Which topology provides high availability and connects some, but not all, remote sites?

partial mesh

A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?

physical

A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?

physical layer

What is a key characteristic of the peer-to-peer networking model?

resource sharing without a dedicated server

Which two commands can be used on a Windows host to display the routing table?

route print and netstat -r

What are two services provided by the OSI network layer?

routing packets toward the destination, and encapsulating PDUs from the transport layer

Which name is assigned to the transport layer PDU?

segment

A network technician suspects that a particular network connection between two Cisco switches is having a duplex mismatch. Which command would the technician use to see the Layer 1 and Layer 2 details of a switch port?

show interfaces

Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?

store-and-forward switching

Which command can an administrator issue on a Cisco router to send debug messages to the vty lines?

terminal monitor

What source IP address does a router use by default when the traceroute command is issued?

the IP address of the outbound interface

A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput?

the amount of traffic that is currently crossing the network, the type of traffic that is crossing the network and the latency that is created by the number of network devices that the data is crossing

A user opens three browsers on the same PC to access www.cisco.com to search for certification course information. The Cisco web server sends a datagram as a reply to the request from one of the web browsers. Which information is used by the TCP/IP protocol stack in the PC to identify which of the three web browsers should receive the reply?

the destination port number

What are two ways that TCP uses the sequence numbers in a segment?

to identify missing segments at the destination and to reassemble the segments at the remote location

An administrator uses the Ctrl-Shift-6 key combination on a switch after issuing the ping command. What is the purpose of using these keystrokes?

to interrupt the ping process

What are two functions of NVRAM?

to retain contents when power is removed and to store the startup configuration file

Which procedure is used to reduce the effect of crosstalk in copper cables?

twisting opposing circuit wire pairs together