Cisco Final Exam part 1*
The address is returned to the pool for reuse when the lease expires.
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?
audio conference, financial transactions, web page
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?
The frame has the broadcast address as the destination address. & The destination address is unknown to the switch.
Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on?
destination MAC address to a destination IPv4 address
What addresses are mapped by ARP?
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?
10.0.0.0/8 172.16.0.0/12 192.168.0.0/16
What are the three ranges of IP addresses that are reserved for internal private use?
It is not associated with any physical interface on a switch & It provides a means to remotely manage a switch & It is associated with VLAN1 by default.
What are three characteristics of an SVI?
subnet mask
When IPv4 addressing is manually configured on a web server, which property of the IPv4 configuration identifies the network and host portion for an IPv4 address?
login block-for 60 attempts 5 within 60
When applied to a router, which command would help mitigate brute-force password attacks against the router?
on as many different network segments as possible
When planning for network growth, where in the network should packet captures take place to assess network traffic?
console line
Where are Cisco IOS debug output messages sent by default?
Terminal Monitor
Which command can an administrator issue on a Cisco router to send debug messages to the vty lines?
an SSH connection
Which connection provides a secure CLI session with encryption to a Cisco network device?
an SSH connection
Which connection provides a secure CLI session with encryption to a Cisco switch?
.com
Which domain name would be an example of a top-level domain?
stateful packet inspection
Which firewall feature is used to ensure that packets coming into a network are legitimate responses to requests initiated from internal hosts?
store-and-forward switching
Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?
segment
Which name is assigned to the transport layer PDU?
client/server
Which networking model is being used when an author uploads one chapter document to a file server of a book publisher?
twisting opposing circuit wire pairs together
Which procedure is used to reduce the effect of crosstalk in copper cables?
FE80::/10
Which range of link-local addresses can be assigned to an IPv6-enabled interface?
SLAAC
Which service provides dynamic global IPv6 addressing to end devices without using a server that keeps a record of available IPv6 addresses?
192.168.1.64/26
Which subnet would include the address 192.168.1.96 as a usable host address?
fast-forward
Which switching method has the lowest level of latency?
network & transport
Which two OSI model layers have the same functionality as two layers of the TCP/IP model?
route print & netstat -r
Which two commands can be used on a Windows host to display the routing table?
packet forwarding & path selection
Which two functions are primary functions of a router?
DNS & POP
Which two protocols operate at the highest layer of the TCP/IP protocol stack?
client & server
Which two roles can a computer assume in a peer-to-peer network where a file is being shared between two computers?
compression & encryption
Which two tasks are functions of the presentation layer?
straight-through
Which type of UTP cable is used to connect a PC to a switch port?
to enable a receiving host to forward the data to the appropriate application
Why are port numbers included in the TCP header of a segment?
to identify the network address of the destination network
Why does a Layer 3 device perform the ANDing process on a destination IP address and subnet mask?
It will discard the frame.
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?
WAN
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?
DSL
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?
leased line
A medium-sized business is researching available options for connecting to the Internet. The company is looking for a high speed option with dedicated, symmetric access. Which connection type should the company choose?
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 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?
physical layer
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?
an increase in host-to-host ping response times
A network engineer is analyzing reports from a recently performed network baseline. Which situation would depict a possible latency issue?
partial mesh
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?
The command is being entered from the wrong mode of operation.
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?
show interfaces
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?
255.255.255.128
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?
nslookup
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?
DNS
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?
the destination port number
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?
DHCP
A wireless host needs to request an IP address. What protocol would be used to process the request?
The new configuration will be loaded if the switch is restarted.
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?
NVRAM
After several configuration changes are made to a router, the copy running-configuration startup-configuration command is issued. Where will the changes be stored?
to interrupt the ping process
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?
link-local
At a minimum, which address is required on IPv6-enabled interfaces?
The physical address is added.
During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?
Multicast
Fill in the blank. During data communications, a host may need to send a single message to a specific group of destination hosts simultaneously. This message is in the form of a ______ message.
by providing mechanisms to manage congested network traffic
How does quality of service help a network support a wide range of applications and services?
6
How many hosts are addressable on a network that has a mask of 255.255.255.248?
30
How many usable IP addresses are available on the 192.168.1.0/27 network?
62
How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?
drop the frame
If a device receives an Ethernet frame of 60 bytes, what will it do?
when a faster delivery mechanism is needed & when applications do not need to guarantee delivery of the data
In what two situations would UDP be the preferred transport protocol over TCP?
VLAN 1
On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?
A single packet can be sent to a group of hosts & Multicast transmission can be used by routers to exchange routing information & Routers will not forward multicast addresses in the range of 224.0.0.0 to 224.0.0.255.*
What are three characteristics of multicast transmission?
using the source MAC addresses of frames to build and maintain a MAC address table & utilizing the MAC address table to forward frames via the destination MAC address
What are two actions performed by a Cisco switch?
It prevents technology in one layer from affecting other layers & It assists in protocol design.
What are two benefits of using a layered network model?
They are globally unique & They are expressed as 12 hexadecimal digits.
What are two characteristics of Ethernet MAC addresses?
It is not affected by EMI or RFI.
What are two characteristics of fiber-optic cable?
port numbering & use of checksum
What are two characteristics shared by TCP and UDP?
fast-forward switching & fragment-free switching
What are two examples of the cut-through switching method?
to retain contents when power is removed & to store the startup configuration file
What are two functions of NVRAM
routing packets toward the destination & encapsulating PDUs from the transport layer
What are two services provided by the OSI network layer?
to identify missing segments at the destination & to reassemble the segments at the remote location
What are two ways that TCP uses the sequence numbers in a segment?
scalability
What characteristic of a network enables it to quickly grow to support new users and applications without impacting the performance of the service being delivered to existing users?
It completes the remainder of a partially typed word in a command.
What function does pressing the Tab key have when entering a command in IOS?
destination and source port numbers
What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?
source and destination IP address
What information is added during encapsulation at OSI Layer 3?
Network capabilities are extended without requiring investment in new infrastructure, personnel, or software.
What is a benefit of using cloud computing in networking?
cancellation
What is a characteristic of UTP cabling?
a network that recovers quickly when a failure occurs and depends on redundancy to limit the impact of a failure
What is a characteristic of a fault tolerant network?
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
What is a characteristic of the LLC sublayer?
resource sharing without a dedicated server
What is a key characteristic of the peer-to-peer networking model?
It encourages competition and promotes choices.
What is an advantage to using a protocol that is defined by an open standard?
Every device in a peer-to-peer network can function as a client or a server.
What is one difference between the client-server and peer-to-peer network models?
The computer receives an IP address that starts with 169.254
What is one indication that a Windows computer did not receive an IPv4 address from a DHCP server?
sliding window
What is the TCP mechanism used in congestion avoidance?
203.0.113.211
What is the dotted decimal representation of the IPv4 address 11001011.00000000.01110001.11010011?
to request an HTML page from a web server
What is the function of the HTTP GET message?
It interfaces between the users and the kernel.
What is the function of the shell in an OS?
2001:0:0:abcd::1
What is the most compressed representation of the IPv6 address 2001:0000:0000:abcd:0000:0000:0000:0001?
segmentation
What is the process of dividing a data stream into smaller pieces before transmission?
to reduce the cost of deploying and maintaining the communication infrastructure*
What is the purpose of having a converged network?
It tests the internal configuration of an IPv6 host.
What is the purpose of the command ping ::1?
internet
What layer is responsible for routing messages through an internetwork in the TCP/IP model?
CSMA/CA
What method is used to manage contention-based access on a wireless network?
DNS
What network service resolves the URL entered on a PC to the IP address of the destination server?
TCP
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?
It converts IPv6 packets into IPv4 packets.
What purpose does NAT64 serve in IPv6?
the IP address of the outbound interface
What source IP address does a router use by default when the traceroute command is issued?
255.255.255.192
What subnet mask is needed if an IPv4 network has 40 devices that need IP addresses and address space is not to be wasted?
Link-local
What type of IPv6 address is FE80::1?
MAC adress
What unique address is embedded in an Ethernet NIC and used for communication on an Ethernet network?
