This practice exam covers basic computer networking, to include the installation and configuration of networks, media types, configuration types, and network security. Passing this exam will require knowledge in the Ethernet Protocol, IPv4, and some IPv6, MAC addressing, TCP/UDP, the OSI Layer, and various other protocols such as SNMP, SSH, FTP, SSL/TLS, and more.
Answer Description
The arp command display and modifies entries in the Address Resolution Protocol (ARP) table, which contains IP and MAC Addresses.
Troubleshooting
This question is filed under objective 4, Troubleshooting
Wikipedia
Answer Description
TACACS+ is an open standard protocol developed by Cisco that is used to authenticate users across a network.
Industry standards, practices, and network theory
This question is filed under objective 5, Industry standards, practices, and network theory
Wikipedia
Answer Description
A switch operates at level 2 of the OSI model, and forwards network traffic based of MAC Addresses.
Industry standards, practices, and network theory
This question is filed under objective 5, Industry standards, practices, and network theory
Wikipedia
Answer Description
Network Mapper (NMAP) is a security scanner used to discover hosts and services on a computer network.
Network operations
This question is filed under objective 2, Network operations
Wikipedia
- A) The route table of the next-hop router
- B) The arp table of the ISP's gateway router.
- C) The route table of the new customer's router
- D) The arp table of the network user
Answer Description
Because the router is new, it is likely that the new customer's router has not yet updated it's route table and that would be the best place to look.
Troubleshooting
This question is filed under objective 4, Troubleshooting
Wikipedia
- A) Port Mirroring
- B) VPN Client and Concentrator
- C) Smart jacks installed for each network jack
- D) Proxy server with content filter
Answer Description
Enabling port mirroring on a network device, usually a switch, will duplicate all network traffic out a single network port so a packet sniffer may then record the traffic.
Network Architecture
This question is filed under objective 1, Network Architecture
Wikipedia
Answer Description
In IPv6, link local addresses belong to the FE80::/10 address block. Link local is the IPv6 equivalent of IPv4's private addressing.
Network Architecture
This question is filed under objective 1, Network Architecture
Wikipedia
Answer Description
Spanning Tree Protocol (STP) is used on network switches to disable duplicate routes until needed. Without STP, these duplicate routes will result in loops in network traffic.
Network Architecture
This question is filed under objective 1, Network Architecture
Wikipedia
Answer Description
Syslog is a standardized computer message logging technology, which can be used on many operating systems such as Windows and Linux.
Industry standards, practices, and network theory
This question is filed under objective 5, Industry standards, practices, and network theory
Wikipedia
Answer Description
A packet sniffer will record network traffic onto a storage device for later review. This will allow you to save and analyze the employees network traffic.
Network security
This question is filed under objective 3, Network security
Wikipedia
Answer Description
In IPv4 addressing the 10.0.0.0 - 10.255.255.255 range is the private IP range for Class A addresses.
Network Architecture
This question is filed under objective 1, Network Architecture
Wikipedia
Answer Description
Out-of-band management is the use of a trusted, dedicated management channel for accessing a network device. This data is transmitted separately from in-band data such as network traffic.
Network operations
This question is filed under objective 2, Network operations
Wikipedia
Answer Description
The TCP protocol operates on layer 4, the Transport layer of the OSI model.
Industry standards, practices, and network theory
This question is filed under objective 5, Industry standards, practices, and network theory
Wikipedia
Answer Description
802.11a uses the 5 GHz frequency range, and is a good alternative when the 2.4 GHz range is unusable.
Network Architecture
This question is filed under objective 1, Network Architecture
Wikipedia
Answer Description
The ifconfig command is used in Unix-like operating systems to display and configure TCP/IP network interface parameteres.
Troubleshooting
This question is filed under objective 4, Troubleshooting
Wikipedia
Answer Description
The Internet Control Message Protocol (ICMP) is used to control IP networks. It is used for error reporting, network congestion, and availability.
Industry standards, practices, and network theory
This question is filed under objective 5, Industry standards, practices, and network theory
Wikipedia
Answer Description
The Transport layer, or layer 4, of the OSI model is located between the Network and Session layers.
Industry standards, practices, and network theory
This question is filed under objective 5, Industry standards, practices, and network theory
Wikipedia
Answer Description
The interface in this situation is a WAN interface. The only option here that is a WAN interface is Serial 0/0/0. Fast Ethernet is a similar option, but is typically used for LAN communications.
Troubleshooting
This question is filed under objective 4, Troubleshooting
Answer Description
Power over Ethernet (PoE) is a technology that passes electrical power along with data on an Ethernet cable, thus providing power to the distant network device.
Network Architecture
This question is filed under objective 1, Network Architecture
Wikipedia
Answer Description
Tracert (traceroute) is a diagnostic tool that will display the route and measure transmit times between network devices.
Troubleshooting
This question is filed under objective 4, Troubleshooting
Wikipedia
WOOOOO!
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