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1. What specialised community system is liable for imposing entry management insurance policies between networks?
C. Firewalls are used to allow or block site visitors between networks in response to entry management insurance policies.
2. What data does an Ethernet swap study and use to construct its tackle desk?
Supply IP tackle
Vacation spot IP tackle
Supply MAC tackle
Vacation spot MAC tackle
C. An Ethernet swap examines the supply MAC tackle of an incoming body. If the supply MAC tackle is just not within the MAC tackle desk, the swap will add it to the desk with the related ingress Ethernet port.
3. Which system is an middleman system?
Good system
PC
Server
Firewall
D. An middleman system sends community messages towards a closing vacation spot. Examples of middleman units embrace a firewall, router, swap, multilayer swap, and wi-fi router.
4. Which assertion describes a distinction between RADIUS and TACACS+?
RADIUS makes use of TCP, whereas TACACS+ makes use of UDP.
RADIUS is supported by the Cisco Safe ACS software program, whereas TACACS+ is just not.
RADIUS encrypts solely the password, whereas TACACS+ encrypts all communication.
RADIUS separates authentication and authorization, whereas TACACS+ combines them as one course of.
C. TACACS+ makes use of TCP, encrypts the whole packet (not simply the password), and separates authentication and authorization into two distinct processes. Each protocols are supported by the Cisco Safe ACS software program.
5. Which wi-fi parameter refers back to the frequency bands used to transmit information to a wi-fi entry level?
SSID
Safety mode
Scanning mode
Channel settings
D. An entry level might be manually set to a selected frequency band or channel as a way to keep away from interference with different wi-fi units within the space.
6. What specialised community system makes use of signatures to detect patterns in community site visitors?
Bridges
Switches
IDS
Firewalls
C. Intrusion detection techniques (IDSs) use a algorithm, known as signatures, to determine malicious site visitors on the community.
7. What kind of bodily topology might be created by connecting all Ethernet cables to a central system?
A. Gadgets linked to the Ethernet star topology connect with both a hub or a swap.
8. Which community service synchronizes the time throughout all units on the community?
C. There are two strategies that can be utilized to set date and time settings on community units. Handbook configuration and routinely utilizing the Community Time Protocol (NTP). NTP retains the time throughout all units synchronized by utilizing a hierarchical system of sources.
9. Which community service permits directors to observe and handle community units?
B. SNMP is an software layer protocol that permits directors to handle and monitor units on the community akin to routers, switches, and servers.
10. What are two sorts of addresses discovered on community finish units? (Select two.)
Middleman units use two sorts of addresses when sending messages to the ultimate vacation spot system, MAC and IP addresses. TCP and UDP are protocols used at Layer 4 to determine what port numbers are getting used on the supply and vacation spot units. A return tackle is used when mailing a letter, not in networking.
11. Which OSI layer header is rewritten with new addressing data by a router when forwarding between LAN segments?
Layer 2
Layer 3
Layer 4
Layer 7
When a router forwards site visitors between LAN segments it encapsulates the Layer 2 body to find out the Layer 3 path. As soon as the Layer 3 path is set, the router encapsulates the Layer 3 packet in a brand new Layer 2 body with new Layer 2 addressing infomation for the vacation spot LAN section.
12. Which protocol gives authentication, integrity, and confidentiality providers and is a sort of VPN?
IPsec providers enable for authentication, integrity, entry management, and confidentiality. With IPsec, the knowledge exchanged between distant websites might be encrypted and verified. Each remote-access and site-to-site VPNs might be deployed utilizing IPsec.
13. What are two makes use of of an entry management listing? (Select two.)
ACLs can management which areas a bunch can entry on a community.
ACLs present a primary stage of safety for community entry.
Normal ACLs can prohibit entry to particular functions and ports.
ACLs can allow or deny site visitors based mostly upon the MAC tackle originating on the router.
ACLs help the router in figuring out one of the best path to a vacation spot.
ACLs can be utilized for the next:Restrict community site visitors as a way to present enough community efficiency Limit the supply of routing updates Present a primary stage of safety Filter site visitors based mostly on the kind of site visitors being despatched Filter site visitors based mostly on IP addressing
14. Which protocol or service is used to routinely synchronize the software program clocks on Cisco routers?
Community Time Protocol (NTP) is used to permit community units to synchronize their time settings with a centralized time server. DHCP (Dynamic Host Configuration Protocol) is a protocol which assigns IP addresses to hosts. DNS (Area Identify Service) is a service which resolves host names to IP addresses. SNMP (Easy Community Administration Protocol) is a protocol which permits directors to handle community nodes.
15. What’s the solely attribute utilized by commonplace entry management lists to determine site visitors?
supply MAC tackle
protocol kind
supply IP tackle
supply TCP port
Normal entry management lists can solely determine site visitors based mostly on the supply IPv4 tackle within the protocol header.
16. Which wi-fi parameter is utilized by an entry level to broadcast frames that embrace the SSID?
passive mode
safety mode
channel setting
lively mode
The 2 scanning or probing modes an entry level might be positioned into are passive or lively. In passive mode, the AP advertises the SSID, supported requirements, and safety settings in broadcast beacon frames. In lively mode, the wi-fi consumer should be manually configured for a similar wi-fi parameters because the AP has configured.
17. A Cisco router is working IOS 15. What are the 2 routing desk entry sorts that will probably be added when a community administrator brings an interface up and assigns an IP tackle to the interface? (Select two.)
route that’s discovered by way of OSPF
route that’s discovered by way of EIGRP
route that’s manually entered by a community administrator
immediately linked interface
native route interface
An area route interface routing desk entry is discovered when a router runs IOS 15 or increased or if IPv6 routing is enabled. Each time an interface is addressed and enabled (made lively), a immediately linked interface is routinely proven within the routing desk.
18. Check with the exhibit. The community “A” accommodates a number of company servers which might be accessed by hosts from the Web for details about the company. What time period is used to explain the community marked as “A”?
A demilitarized zone or DMZ is a community space protected by a number of firewalls. The DMZ sometimes accommodates servers which might be generally accessed by exterior customers. An online server is often contained in a DMZ.
19. What’s the function of an IPS?
to detect patterns of malicious site visitors by means of signature recordsdata
to filter site visitors based mostly on outlined guidelines and connection context
to filter site visitors based mostly on Layer 7 data
to implement entry management insurance policies based mostly on packet content material
For detecting malicious exercise, an IPS makes use of a algorithm referred to as signatures to detect patterns in community site visitors.
20. Which two options are included by each TACACS+ and RADIUS protocols? (Select two.)
SIP assist
password encryption
802.1X assist
separate authentication and authorization processes
utilization of transport layer protocols
Each TACACS+ and RADIUS assist password encryption (TACACS+ encrypts all communication) and use Layer 4 protocol (TACACS+ makes use of TCP and RADIUS makes use of UDP). TACACS+ helps separation of authentication and authorization processes, whereas RADIUS combines authentication and authorization as one course of. RADIUS helps distant entry expertise, akin to 802.1x and SIP; TACACS+ doesn’t.
21. What does the TACACS+ protocol present in a AAA deployment?
AAA connectivity by way of UDP
compatibility with earlier TACACS protocols
authorization on a per-user or per-group foundation
password encryption with out encrypting the packet
TACACS+ makes use of TCP port 49, gives authorization on a per-user or per-group foundation, encrypts the whole packet, and doesn’t present compatibility with earlier TACACS protocols.
22. Which parameter is often used to determine a wi-fi community title when a house wi-fi AP is being configured?
The SSID is used to call a wi-fi community. This parameter is required to ensure that a wi-fi consumer to connect to a wi-fi AP.
23. What data inside an information packet does a router use to make forwarding choices?
the vacation spot service requested
the vacation spot IP tackle
the vacation spot host title
the vacation spot MAC tackle
A Layer 3 system like a router makes use of a Layer 3 vacation spot IP tackle to make a forwarding determination.
24. Which protocol creates a digital point-to-point connection to tunnel unencrypted site visitors between Cisco routers from a wide range of protocols?
Generic Routing Encapsulation (GRE) is a tunneling protocol developed by Cisco that encapsulates multiprotocol site visitors between distant Cisco routers. GRE doesn’t encrypt information. OSPF is a open supply routing protocol. IPsec is a set of protocols that enable for the trade of data that may be encrypted and verified. Web Key Alternate (IKE) is a key administration commonplace used with IPsec.
25. Which two statements are true about NTP servers in an enterprise community? (Select two.)
NTP servers at stratum 1 are immediately linked to an authoritative time supply.
NTP servers guarantee an correct time stamp on logging and debugging data.
There can solely be one NTP server on an enterprise community.
All NTP servers synchronize on to a stratum 1 time supply.
NTP servers management the imply time between failures (MTBF) for key community units.
Community Time Protocol (NTP) is used to synchronize the time throughout all units on the community to ensure correct timestamping on units for managing, securing and troubleshooting. NTP networks use a hierarchical system of time sources. Every stage on this hierarchical system known as a stratum. The stratum 1 units are immediately linked to the authoritative time sources.
26. What’s true regarding bodily and logical topologies?
Bodily topologies show the IP addressing scheme of every community.
Logical topologies check with how a community transfers information between units.
The logical topology is at all times the identical because the bodily topology.
Bodily topologies are involved with how a community transfers frames.
Bodily topologies present the bodily interconnection of units. Logical topologies present the best way the community will switch information between linked nodes.
27. Which layer of the hierarchical design mannequin is a management boundary between the opposite layers?
entry
community
distribution
core
The three design layers from lowest to highest are entry, distribution, and core. The distribution layer generally gives policy-based connectivity which allows or denies site visitors based mostly on predefined parameters. The distribution layer additionally acts as a management boundary between the entry and core layers.
28. Which protocol or service permits community directors to obtain system messages which might be offered by community units?
Cisco developed NetFlow for the aim of gathering statistics on packets flowing by Cisco routers and multilayer switches. SNMP can be utilized to gather and retailer details about a tool. Syslog is used to entry and retailer system messages. NTP is used to permit community units to synchronize time settings.
29. What’s a perform of a proxy firewall?
makes use of signatures to detect patterns in community site visitors
connects to distant servers on behalf of shoppers
drops or forwards site visitors based mostly on packet header data
filters IP site visitors between bridged interfaces
Proxy firewalls filter site visitors by the applying layer of the TPC/IP mannequin and defend consumer data by connecting to distant servers on behalf of shoppers.
30. What’s the perform of the distribution layer of the three-layer community design mannequin?
aggregating entry layer connections
offering excessive velocity connection to the community edge
offering safe entry to the Web
offering direct entry to the community
The perform of the distribution layer is to supply connectivity to providers and to combination the entry layer connections
31.Which LAN topology requires a central intermediate system to attach finish units?
In a star community topology finish units are linked to a central intermediate system akin to a hub or a swap.
32. Which system can management and handle numerous company APs?
A wi-fi LAN controller (WLC) might be configured to handle a number of light-weight entry factors (LWAPs). On the WLC, a community administrator can configure SSIDs, safety, IP addressing, and different wi-fi community parameters in a centralized administration surroundings.
33. For which discovery mode will an AP generate essentially the most site visitors on a WLAN?
lively mode
combined mode
passive mode
open mode
The 2 discovery modes are passive and lively. When working in passive mode, an AP will generate extra site visitors because it frequently broadcasts beacon frames to potential shoppers. In lively mode, the consumer initiates the invention course of as a substitute of the AP. Blended mode refers to community mode settings, and open mode refers to safety parameter settings.
34. What’s a function of the TACACS+ protocol?
It makes use of UDP to supply extra environment friendly packet switch.
It hides passwords throughout transmission utilizing PAP and sends the remainder of the packet in plaintext.
It encrypts the whole physique of the packet for safer communications.
It combines authentication and authorization as one course of.
TACACS+ has the next options:separates authentication and authorization encrypts all communication makes use of TCP port 49
35. Match every system to a class.
Reply
36. Match the vacation spot community routing desk entry kind with a defintion.
Reply
37. Match the community safety system kind with the outline.
