Soal Ujian » Archives for cisco

CCNA Exam 642-432 – Cisco Voice Over IP

Exam : 642-432
Title : Cisco Voice Over IP
Ver : 02.13.07

2 Example Questions out of 213 Questions:

QUESTION 5
What is the E.164 numbering plan?
A. A proprietary PBX number plan.
B. The IETF North American number plan.
C. The European PBX standard telephony number plan.
D. The ITU worldwide number plan.

Answer: D

Explanation:
Numbering Scheme
The standard PSTN is a large, circuit-switched network. It uses a specific numbering scheme, which complies with the ITU-T international public telecommunications numbering plan (E.164) recommendations. For example, in North America, the North American Numbering Plan (NANP) is used, which consists of an area code, an office code, and a station code. Area codes are assigned geographically, office codes are assigned to specific switches, and station codes identify a specific port on that switch.

Teruskan membaca CCNA Exam 642-432 – Cisco Voice Over IP »
Filed Under: CCNA Exam Tagged With: , , , ,

CCNA: NAT and PAT Explanation

NAT and PAT Explanation

NAT and PAT main features:
NAT (Network Address Translation) can be used for a variety of purposes and can be either dynamically or statically assigned. Static NAT is designed to allow one-to-one mapping of local and global addresses. This is particularly useful for hosts which must have a consistent address that is accessible from the Internet. These internal hosts may be enterprise servers or networking devices.

Teruskan membaca CCNA: NAT and PAT Explanation »
Filed Under: CCNA References Tagged With: , , , , , , , ,

CCNA Exam 642-311 – Cisco Optical SONET Exam

Exam : 642-311
Title : Cisco Optical SONET Exam
Ver : 02.14.07

2 Example Questions out of 60 Questions:

QUESTION 13:
Scrambling of SONET signals is done to _____.
A. prevent the leakage of external fiber emissions
B. provide the optical network with the highest level of security possible
C. assure an even distribution of 1′s and 0′s for extended transmitter life
D. assure an adequate number of transitions for clock recovery at the receiver
E. prevent the receiver from assuming AIS inadvertently when all 0′s are received

Answer: D

Teruskan membaca CCNA Exam 642-311 – Cisco Optical SONET Exam »
Filed Under: CCNA Exam Tagged With: , , ,