Austins study guide
What are three characteristics of the CSMA/CD process? (Choose three.)
-After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired. -All of the devices on a segment see data that passes on the network medium. -A device listens and waits until the media is not busy before transmitting.
Which subnet would include the address 192.168.1.96 as a usable host address?
192.168.1.64/26
What is the subnet ID associated with the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64?
2001:DA48:FC5:A4::/64
A network administrator is adding a new LAN to a branch office. The new LAN must support 25 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.224
What service is provided by HTTP?
A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.
What are two problems that can be caused by a large number of ARP request and reply messages? (Choose two.)
A large number of ARP request and reply messages may slow down the switching process, leading the switch to make many changes in its MAC table. The ARP request is sent as a broadcast, and will flood the entire subnet.
Match each item to the type of topology diagram on which it is typically identified. (Not all options are used.) (Q45)
A logical topology diagram typically depicts the IP addressing scheme and groupings of devices and ports. A physical topology diagram shows how those devices are connected to each other and the network, focusing on the physical locations of intermediary devices, configured ports, and cabling.
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.
Which two statements describe how to assess traffic flow patterns and network traffic types using a protocol analyzer? (Choose two.)
Capture traffic during peak utilization times to get a good representation of the different traffic types. Perform the capture on different network segments.
Which three layers of the OSI model map to the application layer of the TCP/IP model? (Choose three.)
Application, Presentation, Session
What happens when the transport input ssh command is entered on the switch vty lines?
Communication between the switch and remote users is encrypted
An administrator defined a local user account with a secret password on router R1 for use with SSH. Which three additional steps are required to configure R1 to accept only encrypted SSH connections? (Choose three.)
Configure the IP domain name on the router. Generate the SSH keys. Enable inbound vty SSH sessions.
A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?
DHCP
A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment. Which two factors may interfere with the copper cabling and result in signal distortion and data corruption? (Choose two.) EMI signal attenuation crosstalk RFI extended length of cabling
EMI and RFI
A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured?
Exit privileged EXEC mode and press Enter.
Which range of link-local addresses can be assigned to an IPv6-enabled interface?
FE80::/10
What two pieces of information are displayed in the output of the show ip interface brief command? (Choose two.)
IP addresses Layer 1 statuses
What are two features of ARP? (Choose two.)
If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply. 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.
What mechanism is used by a router to prevent a received IPv4 packet from traveling endlessly on a network?
It decrements the value of the TTL field by 1 and if the result is 0, it discards the packet and sends a Time Exceeded message to the source host.
How does the service password-encryption command enhance password security on Cisco routers and switches?
It encrypts passwords that are stored in router or switch configuration files.
A client is using SLAAC to obtain an IPv6 address for its interface. After an address has been generated and applied to the interface, what must the client do before it can begin to use this IPv6 address?
It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network.
A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in its ARP cache. How will the device obtain a destination MAC address?
It will send an ARP request for the MAC address of the default gateway.
Refer to the exhibit. Host B on subnet Teachers transmits a packet to host D on subnet Students. Which Layer 2 and Layer 3 addresses are contained in the PDUs that are transmitted from host B to the router? (Q37)
Layer 2 destination address = 00-00-0c-94-36-ab Layer 2 source address = 00-00-0c-94-36-bb Layer 3 destination address = 172.16.20.200 Layer 3 source address = 172.16.10.200
Match each description with an appropriate IP address. (Not all options are used.) (Q34)
Link-Local addresses are assigned automatically by the OS environment and are located in the block 169.254.0.0/16. The private addresses ranges are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. TEST-NET addresses belong to the range 192.0.2.0/24. The addresses in the block 240.0.0.0 to 255.255.255.254 are reserved as experimental addresses. Loopback addresses belong to the block 127.0.0.0/8.
Which two statements accurately describe an advantage or a disadvantage when deploying NAT for IPv4 in a network? (Choose two.)
NAT provides a solution to slow down the IPv4 address depletion. NAT introduces problems for some applications that require end-to-end connectivity.
Which two protocols operate at the top layer of the TCP/IP protocol suite? (Choose two.)
POP DNS
Match the application protocols to the correct transport protocols
TCP - FTP, HTTP, SMTP UDP - DHCP, TFTP
What is the consequence of configuring a router with the ipv6 unicast-routing global configuration command?
The IPv6 enabled router interfaces begin sending ICMPv6 Router Advertisement messages.
Which two statements are correct in a comparison of IPv4 and IPv6 packet headers? (Choose two.)
The Source Address field name from IPv4 is kept in IPv6. The Time-to-Live field from IPv4 has been replaced by the Hop Limit field in IPv6.
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? (Q21)
The administrator must first enter privileged EXEC mode before issuing the command.
What will happen if the default gateway address is incorrectly configured on a host?
The host cannot communicate with hosts in other networks.
Data is being sent from a source PC to a destination server. Which three statements correctly describe the function of TCP or UDP in this situation?
The source port field identifies the running application or service that will handle data returning to the PC. UDP segments are encapsulated within IP packets for transport across the network. The UDP destination port number identifies the application or service on the server which will handle the data.
Refer to the exhibit. What is wrong with the displayed termination?
The untwisted length of each wire is too long.
Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct? (Choose two.) (Q22)
There are 4 hops between this device and the device at 192.168.100.1. There is connectivity between this device and the device at 192.168.100.1.
What are the two most effective ways to defend against malware? (Choose two.)
Update the operating system and other application software. Install and update antivirus software.
Users report that the network access is slow. After questioning the employees, the network administrator learned that one employee downloaded a third-party scanning program for the printer. What type of malware might be introduced that causes slow performance of the network?
Worm
A company has a file server that shares a folder named Public. The network security policy specifies that the Public folder is assigned Read-Only rights to anyone who can log into the server while the Edit rights are assigned only to the network admin group. Which component is addressed in the AAA network service framework?
authorization
What are two characteristics of IP? (Choose two.)
does not require a dedicated end-to-end connection operates independently of the network media
Which frame field is created by a source node and used by a destination node to ensure that a transmitted data signal has not been altered by interference, distortion, or signal loss?
frame check sequence field
Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.)
integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper implements CSMA/CD over legacy shared half-duplex media
What does the term "attenuation" mean in data communication?
loss of signal strength as distance increases
What are two common causes of signal degradation when using UTP cabling? (Choose two.)
low-quality cable or connectors improper termination
What characteristic describes a Trojan horse?
malicious software or code running on an end device
What three requirements are defined by the protocols used in network communcations to allow message transmission across a network? (Choose three.)
message encoding, message size, delivery options
A group of Windows PCs in a new subnet has been added to an Ethernet network. When testing the connectivity, a technician finds that these PCs can access local network resources but not the Internet resources. To troubleshoot the problem, the technician wants to initially confirm the IP address and DNS configurations on the PCs, and also verify connectivity to the local router. Which three Windows CLI commands and utilities will provide the necessary information? (Choose three.)
ping ipconfig nslookup
What is a function of the data link layer?
provides for the exchange of frames over a common local media
An employee of a large corporation remotely logs into the company using the appropriate username and password. The employee is attending an important video conference with a customer concerning a large sale. It is important for the video quality to be excellent during the meeting. The employee is unaware that after a successful login, the connection to the company ISP failed. The secondary connection, however, activated within seconds. The disruption was not noticed by the employee or other employees. What three network characteristics are described in this scenario? (Choose three.)
quality of service fault tolerance security
Refer to the exhibit. If PC1 is sending a packet to PC2 and routing has been configured between the two routers, what will R1 do with the Ethernet frame header attached by PC1? (Q32)
remove the Ethernet header and configure a new Layer 2 header before sending it out S0/0/0
A network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network? (Choose three.) mobility options security interference coverage area packet collision extensive cabling
security interference coverage area
Why would a Layer 2 switch need an IP address?
to enable the switch to be managed remotely