Answer:

A

Explanation:
* Examples of circuit-switched networks
Public switched telephone network (PSTN) ISDN B-channel
* You can get a circuit-switched T1, while frames clouds on T1s are usually packet-switched.

Answer:

B

Explanation:
The Lightweight Directory Access Protocol (LDAP) is an open, vendor-neutral, industry standard application protocol for
accessing and maintaining distributed directory information services over an Internet Protocol (IP) network. Directory
services play an important role in developing intranet and Internet applications by allowing the sharing of information about
users, systems, networks, services, and applications throughout the network.

Answer:

Explanation:
* No. IPv6 addresses are 128 bit in length. * No.No.
IPv6 addresses are written in eight groups of four hexadecimal digits separated by colons, such as
2001:0db8:85a3:0000:0000:8a2e:0370:7334.

Answer:

D

Explanation:
A switch begins learning the local MAC addresses as soon as it is connected to other devices or to a network. This learning
capability makes switches easy to use on a network.
The switch learning process works like this:
1.As a PC or other networked device sends a frame to another device through the switch, the switch captures the source
MAC address of the frame and the interface that received it.
2.The switch confirms or adds the MAC address and the port to the lookup table.

Answer:

C

Explanation:
Rebinding would occur.
Rebinding
If the DHCP client is unable to communicate with the DHCP server from which it obtained its lease, and 87.5 percent of its
lease time has expired, it will attempt to contact any available DHCP server by broadcasting DHCPRequest messages. Any
DHCP server can respond with a DHCPAck message, renewing the lease, or a DHCPNak message, forcing the DHCP client
to initialize and restart the lease process.
Note:
Renewing
IP addressing information is leased to a client, and the client is responsible for renewing the lease. By default, DHCP clients
try to renew their lease when 50 percent of the lease time has expired. To renew its lease, a DHCP client sends a
DHCPRequest message to the DHCP server from which it originally obtained the lease.
Reference: DHCP Client States in the Lease Process

Answer:

A

Explanation:
Telnet, by default, does not encrypt any data sent over the connection (including passwords), and so it is often practical to
eavesdrop on the communications and use the password later for malicious purposes; anybody who has access to a router,
switch, hub or gateway located on the network between the two hosts where Telnet is being used can intercept the packets
passing by and obtain login, password and whatever else is typed with a packet analyzer.

Answer:

A

Explanation:
802.1x
This deployment scenario requires server certificates for each NPS server that performs 802.1X authentication.

Answer:

A D

Explanation:
Media contention occurs when two or more network devices have data to send at the same time. Because multiple devices
cannot talk on the network simultaneously, some type of method must be used to allow one device access to the network
media at a time. This is done in two main ways: carrier sense multiple access collision detect (CSMA/CD) and token passing.

Answer:

B

Explanation:
Cat5/5e/6 Ethernet Copper Cabling has a Maximum Segment Length of 100 Meters.

Answer:

A D

Explanation:
Main procedure for the CSMA/CD:
1. Is my frame ready for transmission? If yes, it goes on to the next point. 2. Is medium idle? If not, wait until it becomes
ready 3. Start transmitting.
4. Did a collision occur? If so, go to collision detected procedure.
5. Reset retransmission counters and end frame transmission.
Note:
Carrier Sense Multiple Access With Collision Detection (CSMA/CD) is a media access control method used most notably in
local area networking using early Ethernet technology. It uses a carrier sensing scheme in which a transmitting data station
detects other signals while transmitting a frame, and stops transmitting that frame, transmits a jam signal, and then waits for
a random time interval before trying to resend the frame.

Answer:

Explanation:
* Dynamic Routing. A router with dynamically configured routing tables is known as a dynamic router. Dynamic routing
consists of routing tables that are built and maintained automatically through an ongoing communication between routers.*
Most of the dominant routing algorithms are dynamic routing algorithms, which adjust to changing network circumstances by
analyzing incoming routing update messages. If the message indicates that a network change has occurred, the routing
software recalculates routes and sends out new routing update messages. These messages permeate the network,
stimulating routers to rerun their algorithms and change their routing tables accordingly.
* When there are multiple routes to the same destination, a router must have a mechanism for calculating the best path. A
metric is a variable assigned to routes as a means of ranking them from best to worst or from most preferred to
leastpreferred.

Answer:

Explanation:
* An SSL VPN (Secure Sockets Layer virtual private network) is a form of VPN that can be used with a standard Web
browser. In contrast to the traditional Internet Protocol Security (IPsec) VPN, an SSL VPN does not require the installation
ofspecialized client software on the end user's computer. It's used to give remote users with access to Web applications,
client/server applications and internal network connections.
* A site-to-site VPN allows offices in multiple fixed locations to establish secure connections with each other over a public
network such as the Internet.
* Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs) or as part of the
delivery of services by ISPs. It does not provide any encryption or confidentiality by itself.

Answer:

Explanation:
Routing Information Protocol (RIP) uses hop count as the metric to rate the value of different routes. The hop count is the
number of devices that can be traversed in a route. A directly connected network has a metric of zero; an unreachable
network has a metric of 16. This limited metric range makes RIP unsuitable for large networks.
The Routing Information Protocol (RIP) sends routing-update messages at regular intervals and when the network topology
changes. When a device receives a RIP routing update that includes changes to an entry, the device updates its routing
table to reflect the new route. The metric value for the path is increased by 1, and the sender is indicated as the next hop.
RIP devices maintain only the best route (the route with the lowest metric value) to a destination. After updating its routing
table, the device immediately begins transmitting RIP routing updates to inform other network devices of the change. These
updates are sent independently of the regularly scheduled updates that RIP devices send.
Summarizing routes in RIP Version 2 improves scalability and efficiency in large networks. Summarizing IP addresses
means that there is no entry for child routes (routes that are created for any combination of the individual IP addresses
contained within a summary address) in the RIP routing table, reducing the size of the table and allowing the router to handle
more routes.
It is a stable protocol that uses a distance-vector algorithm to calculate routes.
References:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_rip/configuration/15-mt/irr-15-mt-book/irr-cfg-info-prot.html

Answer:

C

Explanation:
Transport layer protocols include: UDP, TCP

Answer:

E

Explanation:
Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol address (IP address) to a physical
machine address (MAC address) that is recognized in the local network.