Networks2
A host is accessing a Web server on remote network. Which three functions are performed by intermediary network devices during this conversation?
***regenerating data signals ***applying security settings to control the flow of data *** notifying other devices when errors occur
In a network that uses IPv4, what prefix would best fit a subnet containing 100 hosts?
/25*
Consider the following range of addresses: 2001:0DB8:BC15:00A0:0000:: 2001:0DB8:BC15:00A1:0000:: 2001:0DB8:BC15:00A2:0000:: ... 2001:0DB8:BC15:00AF:0000:: The prefix-length for the range of addresses is
/60* .
Which two notations are useable nibble boundaries when subnetting in IPv6? (Choose two.)
/64* /68*
A network administrator is variably subnetting a given block of IPv4 addresses. Which combination of network addresses and prefix lengths will make the most efficient use of addresses when the need is for 2 subnets capable of supporting 10 hosts and 1 subnet that can support 6 hosts?
10.1.1.128/28* 10.1.1.144/28* 10.1.1.160/29*
Which three IP addresses are private ? (Choose three.)
10.172.168.1* 172.20.4.4 * 192.168.5.254*
Which IPv4 address can be pinged to test the internal TCP/IP operation of a host
127.0.0.1*
How many bits make up the single IPv6 hextet :10CD:?
16*
A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that? (Choose two.)
192.168.1.64/27* 192.168.1.96/28*
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*
What is the prefix for the host address 2001:DB8:BC15:A:12AB::1/64?
2001:DB8:BC15:A*
What is the subnet address for the address 2001:DB8:BC15:A:12AB::1/64?
2001:DB8:BC15:A::0*
What is the metric value that is used to reach the 10.1.1.0 network in the following routing table entry? D 10.1.1.0/24 [90/2170112] via 209.165.200.226, 00:00:05, Serial0/0/0
2170112*
Given the binary address of 11101100 00010001 00001100 00001010, which address does this represent in dotted decimal format?
236.17.12.10*
How many additional bits should be borrowed from a /26 subnet mask in order to create subnets for WAN links that need only 2 useable addresses?
4*
How many bits would need to be borrowed if a network admin were given the IP addressing scheme of 172.16.0.0/16 and needed no more than 16 subnet with equal number of hosts?
4*
Which statement describes a characteristic of the Cisco router management ports?
A console port is not used for packet forwarding.*
Which statement is true about an interface that is configured with the IPv6 address command?
A link-local IPv6 address is automatically configured on the interface.*
A network administrator is enabling services on a newly installed server. Which two statements describe how services are used on a server? (Choose two.)
A port is considered to be open when it has an active server application that is assigned to it.* Server security can be improved by closing ports that are associated with unused services.*
What is the protocol that is used to discover a physical address from a known logical address and what message type does it use?
ARP, broadcast*
Which statement best describes the operation of the File Transfer Protocol?
An FTP server uses a source port number of 20 and a randomly generated destination port number during the establishment of control traffic with an FTP client.*
How does a Layer 3 switch differ from a Layer 2 switch?
An IP address can be assigned to a physical port of a Layer 3 switch. However, this is not supported in Layer 2 switches.*
What must be configured to enable Cisco Express Forwarding (CEF) on most Cisco devices that perform Layer 3 switching?
CEF is enabled by default, so no configuration is necessary.*
To what legacy address class does the address 10.0.0.0 belong?
Class A*
Which keys act as a hot key combination that is used to interrupt an IOS process?
Ctrl-Shift-6*
What three application layer protocols are part of the TCP/IP protocol suite? (Choose three.)
DHCP* DNS* FTP*
A host PC has just booted and is attempting to lease an address through DHCP. Which two messages will the client typically broadcast on the network? (Choose two.)
DHCPDISCOVER* DHCPREQUEST*
A host PC is attempting to lease an address through DHCP. What message is sent by the server to the client know it is able to use the provided IP information?
DHCPOFFER*
What is a characteristic of DNS?
DNS servers can cache recent queries to reduce DNS query traffic.*
Which statement is true regarding the UDP client process during a session with a server?
Datagrams that arrive in a different order than that in which they were sent are not placed in order.*
Which field in an IPv4 packet header will typically stay the same during its transmission?
Destination Address*
Which group of IPv6 addresses cannot be allocated as a host source address?
FF00::/8*
Which destination address is used in an ARP request frame?
FFFF.FFFF.FFFF*
Which two statements describe the characteristics of fiber-optic cabling? (Choose two.)
Fiber-optic cabling does not conduct electricity Fiber-optic cabling is primarily used as backbone cabling.*
What field content is used by ICMPv6 to determine that a packet has expired?
Hop Limit field*
Which two protocols function at the internet layer? (Choose two)
ICMP* IP*
Which two components are configured via software in order for a PC to participate in a network environment? (Choose two.)
IP address* subnet mask*
A user gets an IP address of 192.168.0.1 from the company network administrator. A friend of the user at a different company gets the same IP address on another PC. How can two PCs use the same IP address and still reach the Internet, send and receive email, and search the web?
ISPs use Network Address Translation to change a user IP address into an address that can be used on the Internet.*
What are two features of ARP? (Choose two.)
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.* If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.*
How could a faulty network device create a source of hazard for a user? (Choose two.)
It could stop functioning.* It could explode.*
Which statement describes the sequence of processes executed by a router when it receives a packet from a host to be delivered to a host on another network?
It de-encapsulates the packet, selects the appropriate path, and encapsulates the packet to forward it toward the destination host*
Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks? (Choose two.)
It eliminates most address configuration errors.* It reduces the burden on network support staff.*
What is an important function of the physical layer of the OSI model?
It encodes frames into electrical, optical, or radio wave signals.*
What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?
It forwards the frame out of all ports except for the port at which the frame was received.*
Which characteristics describe fiber optic cable? (Choose two.)
It is not affected by EMI or RFI.* It is the most expensive type of LAN cabling*
What are two features of a physical, star network topology? (Choose two.)
It is straightforward to troubleshoot.* It is easy to add and remove end devices.*
Which statement describes data throughput?
It is the measure of the bits transferred across the media over a given period of time.*
What action does a DHCPv4 client take if it receives more than one DHCPOFFER from multiple DHCP servers?
It sends a DHCPREQUEST that identifies which lease offer the client is accepting.*
An administrator issued the service password-encryption command to apply encryption to the passwords configured for enable password, vty, and console lines. What will be the consequences if the administrator later issues the no service password-encryption command?
It will not reverse any encryption.*
Which statement describes a characteristic of the network layer in the OSI model?
Its protocols specify the packet structure and processing used to carry the data from one host to another.*
What information is maintained in the CEF adjacency table?
MAC address to IPv4 address mappings*
Which address on a PC does not change, even if the PC is moved to a different network?
MAC address*
Which technology provides a solution to IPv4 address depletion by allowing multiple devices to share one public IP address?
NAT*
In which default order will a router search for startup configuration information?
NVRAM, TFTP, setup mode*
During normal operation, from which location do most Cisco routers run the IOS?
RAM*
During normal operation, from which location do most Cisco switches and routers run the IOS?
RAM*
Which two statements correctly describe a router memory type and its contents? (Choose two.)
ROM is nonvolatile and contains basic diagnostic software.* RAM is volatile and stores the IP routing table.*
Which protocol supports rapid delivery of streaming media?
Real-Time Transport Protocol*
Which publicly available resources describe protocols, processes, and technologies for the Internet but do not give implementation details?
Request for Comments*
Which method of IPv6 prefix assignment relies on the prefix contained in RA messages?
SLAAC*
Which three statements characterize the transport layer protocols? (Choose three.)
TCP and UDP port numbers are used by application layer protocols.* TCP uses windowing and sequencing to provide reliable transfer of data.* TCP is a connection-oriented protocol. UDP is a connectionless protocol.*
_____________ is a best-effort, connectionless application layer protocol that is used to transfer file
TFTP*
What information does the loopback test provide?
The TCP/IP stack on the device is working correctly.*
A client is establishing a TCP session with a server. How is the acknowledgment number in the response segment to the client determined?
The acknowledgment number field is modified by adding 1 to the randomly chosen initial sequence number in response to the client.*
What is a possible hazard that can be caused by network cables in a fire?
The cable insulation could be flammable.*
A network administrator is making changes to the configuration of a router. After making the changes and verifying the results, the administrator issues the copy running-config startup-config command. What will happen after this command executes?
The configuration will load when the router is restarted.*
What will happen if the default gateway address is incorrectly configured on a host?
The host cannot communicate with hosts in other networks.*
After making configuration changes, a network administrator issues a copy running-config startup-config command in a Cisco switch. What is the result of issuing this command?
The new configuration will be loaded if the switch is restarted.*
What happens when a switch receives a frame and the calculated CRC value is different than the value that is in the FCS field?
The switch drops the frame.*
What happens when part of an Internet VoIP transmission is not delivered to the destination?
The transmission continues without the missing portion.*
What happens when part of an Internet radio transmission is not delivered to the destination?
The transmission continues without the missing portion.*
What happens when part of an Internet television transmission is not delivered to the destination?
The transmission continues without the missing portion.*
Which two services or protocols use the preferred UDP protocol for fast transmission and low overhead? (Choose two)
VoIP* DNS*
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
Which type of wireless security is easily compromised?
WEP*
Which WLAN security protocol generates a new dynamic key each time a client establishes a connection with the AP?
WPA*
Which type of wireless security generates dynamic encryption keys each time a client associates with an AP?
WPA*
Which type of wireless security makes use of dynamic encryption keys each time a client associates with an AP?
WPA*
Port numbers ranging from 0 to 1023 are considered to be _____________ ports
Well Known
Which statement is true about DHCP operation?
When a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network.*
What device is commonly used to verify a UTP cable?
a cable tester*
What does a router use to determine where to send data it receives from the network?
a routing table*
What type of communication rule would best describe CSMA/CD?
access method*
What are the two main components of Cisco Express Forwarding (CEF)? (Choose two.)
adjacency tables* forwarding information base (FIB)*
Which router interface should be used for direct remote access to the router via a modem?
an AUX port*
A technician is configuring a router to allow for all forms of management access. As part of each different type of access, the technician is trying to type the command login. Which configuration mode should be entered to do this task?
any line configuration mode*
On a school network, students are surfing the web, searching the library database, and attending an audio conference with their sister school in Japan. If network traffic is prioritized with QoS, how will the traffic be classified from highest priority to lowest priority?
audio conference, database, HTTP*
Three office workers 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 office workers 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*
Why does HTTP use TCP as the transport layer protocol?
because HTTP requires reliable delivery*
What two preconfigured settings that affect security are found on most new wireless routers? (Choose two.)
broadcast SSID* default administrator password*
Which function is provided by TCP?
detection of missing packets*
What is contained in the trailer of a data-link frame?
error detection*
Point-to-point communications where both devices can transmit and receive on the medium at the same time are known as ____________________
full-duplex
To prevent faulty network devices from carrying dangerous voltage levels, equipment must be __________ correctly
grounded *
Which communication tool allows real-time collaboration?
instant messaging
A particular telnet site does not appear to be responding on a Windows 7 computer. What command could the technician use to show any cached DNS entries for this web page?
ipconfig /displaydns*
Which two statements describe the functions or characteristics of ROM in a router? (Choose two.)
maintains instructions for POST diagnostics* stores bootstrap program*
There was also a question about if you activated service password encryption in the past and you prompt "no service password encryption" what password are modified ?
no password at all;*
Which of the following are primary functions of a router? (Choose two.)
packet switching* path selection*
A network administrator needs to monitor network traffic to and from servers in a data center. Which features of an IP addressing scheme should be applied to these devices?
predictable static IP addresses for easier identification*
What are three important considerations when planning the structure of an IP addressing scheme? (Choose three.)
preventing duplication of addresses* providing and controlling access* conserving addresses*
What is a function of the data link layer?
provides for the exchange data over a common local media
What types of addresses make up the majority of addresses within the /8 block IPv4 bit space?
public addresses*
What type of communication medium is used with a wireless LAN connection?
radio waves*
A host is accessing a Telnet server on a remote network. Which three functions are performed by intermediary network devices during this conversation? (Choose three)
regenerating data signals* applying security settings to control the flow of data* notifying other devices when errors occur*
A host is accessing an FTP server on a remote network. Which three functions are performed by intermediary network devices during this conversation? (Choose three.)
regenerating data signals* applying security settings to control the flow of data* notifying other devices when errors occur*
Which device should be used for enabling a host to communicate with another host on a different network?
router*
ISOC, IANA, EIA and IEEE represent _______ organizations which help to promote and maintain open internet
standards
Which firewall technique blocks incoming packets unless they are responses to internal requests?
stateful packet inspection*
Which command can an administrator issue on a Cisco router to send debug messages to the vty lines?
terminal monitor*
A technician uses the ping 127.0.0.1 command. What is the technician testing?
the TCP/IP stack on a network host*
A network technician is measuring the transfer of bits across the company backbone for a mission critical application. The technician notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)
the amount of traffic that is currently crossing the network* the type of traffic that is crossing the network* the latency that is created by the number of network devices that the data is crossing*
A network administrator notices that the throughput on the network appears lower than expected when compared to the end-to-end network bandwidth. Which three factors can explain this difference? (Choose three.)
the amount of traffic* the type of traffic*
What is the auto-MDIX feature on a switch?
the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection*
Which parameter does the router use to choose the path to the destination when there are multiple routes available?
the lower metric value that is associated with the destination network*
A frame is transmitted from one networking device to another. Why does the receiving device check the FCS field in the frame?
to check the frame for possible transmission errors*
What is the primary reason to subnet IPv6 prefixes?
to create a hierarchical Layer 3 network design*
What is the effect of configuring the ipv6 unicast-routing command on a router?
to enable the router as an IPv6 router*
Why does layer 3 device perform the ANDing process on a destination IP and subnet Mask?
to identify network address of destination host;*
Why would a network administrator use the tracert utility?
to identify where a packet was lost or delayed on a network*
What is the purpose of the network security accounting function?
to keep track of the actions of a user*
What is the purpose of adjacency tables as used in Cisco Express Forwarding (CEF)?
to maintain Layer 2 next-hop addresses*
What is the purpose of ICMP messages?
to provide feedback of IP packet transmissions*
What is the purpose of the network security authentication function?
to require users to prove who they are*
What is the purpose of the routing process?
to select the paths that are used to direct traffic to destination networks*
A network technician is investigating network connectivity from a PC to a remote host with the address 10.1.1.5. Which command issued on the PC will return to the technician the complete path to the remote host?
tracert 10.1.1.5*
A network administrator is upgrading a small business network to give high priority to real-time applications traffic. What two types of network services is the network administrator trying to accommodate? (Choose two.)
voice* video*
When is a dial-up connection used to connect to an ISP?
when a regular telephone line is used*
What needs to be checked when testing a UTP network cable?
wire map*
Which two components are necessary for a wireless client to be installed on a WLAN? (Choose two.)
wireless NIC* wireless client software*