Cisco final exam

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 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 webpage is delivered to the correct browser window.

Three bank employees are using the corporate network. The first employee uses a web browser to view a company webpage 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, webpage.

Refer to the exhibit. If host A sends an IP packet to host B, what will the destination address be in the frame when it leaves host A?

BB:BB:BB:BB:BB:BB

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

CSMA/CA

What is a characteristic of UTP cabling?

Cancellation

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

DHCP

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

What addresses are mapped by ARP?

Destination MAC address to a destination IPv4 address

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

FE80::/10

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 is charactaristic 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.

Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator uses a console connection to connect to the switch, which password is needed to access user EXEC mode?

Lineconin

What is a benefit of using cloud computing in networking?

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

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 layer

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

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

To interrupt the ping process.

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

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?

1. 10.0.0.0/8 2. 172.16.0.0/12 3. 192.168.0.0/16

Refer to the exhibit. Match the packets with their destination IP address to the exiting interfaces on the router. (not all targets are used). Dit is een sleep-naar-juiste-volgorde opdracht.

1. 172.17.6.15 2. 172.17.14.8 3. 172.17.12.10 4. 172.17.10.5 5. 172.17.8.20

What are two benefits of using a layered network model? (choose two)

1. It assists in protocol design. 2. It prevents technology in one layer from affecting other layers.

What are two charactaristics of fiber-optic cable?

1. It is not affected by EMI or RFI. 2. It is more expensive than UTP cabling is.

What are three characteristics of multicast transmission?

1. a single packet can be sent to a group of hosts. 2. Multicast transmission can be used by routers to exchange routing information. 3. routers will not forward multicast addresses in the range of 244.0.0.0 to 244.0.0.255

Which two tasks are functions of the presentation layer?

1. compression 2. encryption

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

1. data link layer addressing. 2. detection of errors through CRC calculations. 3. Delimiting groups of bits into frames.

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

1. network 2. transport

What are two services provided by the OSI network layer?

1. routing packets toward the destination. 2. encapsulating PDUs from the transport layer.

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 bandwidht expected. Which three factors could influence the differences in throughput?

1. the amount of traffic that is currently crossing the network. 2. the type of traffic that is crossing the network. 3. the latency that is created by the number of network devices that the data is crossing.

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

1. to identify missing segments at the destination. 2. to reassemble the segments at the remote location.

What are two functions of NVRAM?

1. to retain contents when power is removed. 2. to store the startup configuration file.

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 accomodate 126 hosts. Which subnet mask would be used that contains the required number of host bits?

255.255.255.128

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

62

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 statement is true about variable-lenght subnet masking?

the size of each subnet may be different, depending on requirements.

Match the description with the associated IOS mode. (not all options are used). Dit is een sleep-naar-juiste-volgorde opdracht.

user EXEC mode 1. limited number of basic monitoring commands. 2. the first entrance into the CLI of an IOS device. Privileged EXEC mode 1. accessed by entering the enable command. 2. identified by a prompt ending with the # character. Global configuration mode 1. changes made affect the operation of the device as a whole. 2. accessed by entering by configure terminal command.

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 mode would be classified as a trojan horse?

malware that was written to look like a video game

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

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

resource sharing without a dedicated server

Which name is assigned to the transport layer PDU?

Segment

What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between 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.

Refer to the exhibit. What will be the result of entering this configuration the next time a network administrator connects a console cable to the router and no additional commands have been entered?

The administrator will be presented with the R1> prompt.

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.

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

an SSH connection.